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LAB to hex converter
Lightness 53.2408 with a at 80.0925 and b at 67.2032 gives #FF0000, pure red, and the result tells you it was clipped to fit the screen range.
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OKLCH to hex converter
oklch(62.8% 0.258 29.23) becomes #FF0000, pure red, and the result tells you it was clipped to fit what a normal screen can show.
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RGB555 to RGB Unpacker
Turn a packed RGB555 number into ordinary RGB: 0x7C1F gives red 255, green 0 and blue 255. Each five-bit level is scaled to the full 0 to 255 range, so retro…
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XYZ to hex converter
Enter X, Y and Z and get the screen color as a hex code: 0, 0 and 0 give pure black, #000000. Values a screen cannot show are brought to the nearest displayable…
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Darken hex color by percent
Build hover and pressed shades from one brand hex with a fixed percentage, so #4A90D9 at 20 % turns into #2873C0, still the same blue.
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Dim a color by reducing HSV value
Dim a color without shifting its hue: removing 25% of the HSV value turns #40A0FF into #3078BF, with the same hue and saturation and the RGB and HSV numbers…
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Apply gamma correction to a color
Reshape a color's midtones with a power curve: gamma 2.2 turns #3366cc into #07229c, values below 1 brighten midtones instead, and pure black and white never…
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Hex to grayscale by Rec. 709 luminance
Convert #3498DB to gray with Rec. 709 luminance: 0.2126 × red + 0.7152 × green + 0.0722 × blue gives 135.5774, which rounds to 136 and the neutral gray #888888.
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Blend two colors by ratio
At a ratio of 50, #FF0000 and #0000FF each carry a weight of 0.5 and give #800080. You state exactly how much of the second color goes in, so every step of a…
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RGB565 to RGB unpacker
Read a 16-bit RGB565 value as a normal color: 0xF800, or 63488, is pure red, rgb 255, 0, 0 and #FF0000.
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RGB to color temperature
Put a kelvin figure on a screen color: RGB 255, 200, 150 comes out at about 3634.1681 K. The estimate uses CIE chromaticity and McCamy’s classic formula, handy…
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Clamp color to gamut
Bring out-of-range RGB values back inside the 0 to 255 scale: red 300, green −20 and blue 127.5 become 255, 0 and 127.5, and you see which channels changed.
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Color Burn Blend Two Colors
Darken one color by another the way the color burn blend mode does: mid grey #808080 burned with itself drops to #020202, almost black.
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Hex to grayscale by lightness
Turn a hex color into gray the HSL way: #e74c3c has 231 as its highest channel and 60 as its lowest, so the lightness is (231 + 60) / 2 = 145.5 and the gray is…
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Subtractive color mixer
Yellow #FFFF00 and blue #0000FF mixed half and half like paint give green #008000, not the gray a screen-light blend would produce.
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Overlay blend two colors
Overlaying #FFCC00 on the base #336699 gives #66A333, or rgb(102, 163, 51): dark channels of the base are multiplied and light ones are screened, which adds…
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Shift color temperature warmer or cooler
Shift #6699CC by 32 and it becomes the warmer #8699AC: red rises to 134, blue drops to 172 and green stays at 153.
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Unpremultiply RGBA Alpha
Undo premultiplied alpha for one pixel: red 0.125, green 0.25 and blue 0.375 at alpha 0.5 come back as 0.25, 0.5 and 0.75, with alpha unchanged.
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Darken blend two colors
Combine two colors the way the darken blend mode does, keeping the darker value channel by channel: #FF8800 with #00AAFF gives a deep green, #008800.
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Exclusion blend two colors
Combine two colors with the exclusion blend mode: #336699 and #CC8844 give #AD818B, a softer, lower-contrast cousin of the difference blend, ready to copy as…
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Pin light blend
#C0C0C0 on top of #808080 gives #818181: the light top channels only lift the base slightly, from 128 to 129.
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Square color scheme generator
Turn one hex color into a four-color square scheme: #e74c3c gives #82e73c, #3cd7e7 and #a13ce7, each a further 90° around the hue wheel.
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Generate color tints
Give #3366cc and 4 steps and you get tints mixed with 25, 50, 75 and 100 percent white: #668cd9, #99b3e6, #ccd9f2 and #ffffff.
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APCA contrast calculator
Find out how readable a type color is on the surface behind it: near-black #111827 on white scores Lc 104.5, and swapping the two flips the sign.
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W3C brightness difference calculator
Compare two colors with the legacy W3C brightness test: black against white differs by 255, well above the 125 needed to pass.
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CIE94 color difference calculator
Measure how different two Lab colors look with the CIE94 formula, using the graphic-arts defaults of 0.045 for K1 and 0.015 for K2 or textile weights.
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Evenly spaced hue palette
Five colors from a base hue of 200° land 72° apart, starting with #269dd9 and ending with #26d93e.
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Relative luminance calculator
Measure how much light a color gives under the WCAG formula: mid-gray #808080 scores 0.215860500114, on a scale from 0 for black to 1 for white.
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Simulate protanomaly color
Preview a color as seen with weakened red sensitivity: vivid red #e74c3c becomes #416f3e at the default severity of 0.6.
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Protanopia color simulator
See a color the way a person without working red cones might: bright red #e63946 turns into #6c6545.
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Warm and cool color variant palette generator
Start from #6f4bb8 and get five colors: two warmer, the original and two cooler, each pushed 35 or 70 percent of the way toward orange at 30 degrees or blue at…
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Contrast ratio letter grade
Turn a color pair's contrast into a letter you can drop into a review: #111827 on white reaches 17.74 to 1 and earns an A, because grade A starts at 12 to 1.
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Gradient color stops generator
Get every color stop between a start and an end: from #FF0000 to #0000FF in 5 stops gives #BF0040 at 25%, #800080 at 50% and #4000BF at 75%, with both ends…
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Hex alpha to opacity percent
Find the opacity hidden in a hex color: the last pair of #33669980 is 80, which is byte 128 and an opacity of 50.2%, not the 50% many people assume.
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HSL to CSS string formatter
Get a browser-ready hsl() value without hand-typed commas or percent signs: hue 210.456, saturation 64.444 and lightness 42.225 become hsl(210.46, 64.44%…
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Interpolate two colors in HSL
Halfway between #ff0000 and #0000ff in HSL is #ff00ff: the hue takes the short 120° route through magenta instead of passing through green.
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OKLCH to CSS string
Lightness 0.7, chroma 0.15 and hue 180 become oklch(0.7000 0.1500 180.00), or oklch(70.0000% 0.1500 180.00) if you prefer percentages.
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Color swatch SVG generator
Get a ready-made color chip for docs and legends: #3498db becomes a 24 by 24 SVG square filled with that color and labeled for screen readers.
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Cubic-bezier color interpolation
Know the exact color a transition shows at any moment of an eased curve: halfway from #ff6600 to #3366ff with the ease-in-out curve 0.42, 0, 0.58, 1 gives…
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Rich black recipe generator
Get a press-safe rich black build in one step: the standard profile on coated sheetfed gives C60 M40 Y40 K100, 240 % total ink with 80 points to spare under the…
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Halftone tint to gray calculator
See how a screen tint darkens on press: a nominal 50% tint with 15% dot gain covers about 65% of the paper and shows as gray #595959.
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Hex to CMYK ink percentages
See the ink recipe and its total load in one go: #3498db needs cyan 76%, magenta 31%, yellow 0% and key 14%, a total of 121% coverage. Free in your browser.
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Quantize a color to the nearest palette entry
#42A5F5 checked against #000, #369, #ffffff and #3fa7f2 snaps to #3fa7f2 at position 3, with a squared distance of 22.
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Quantile color scale buckets
Give a number a fixed color band: 72 on a 0 to 100 scale with five bands from #ffffcc to #800026 lands in band 4, from 60 to 80, colored #a04050.
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Spot to process approximation
Rebuild a spot ink in four colors and see how close it gets: RGB 200, 16, 46 becomes cyan 0 %, magenta 92 %, yellow 77 % and black 22 %, with a Delta E of…
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Under-color removal calculator for CMYK ink reduction
Replace the shared gray in cyan, magenta and yellow with black ink. At 75 percent removal, 72, 64, 52 and 18 becomes 33, 25, 13 and 57, and total ink drops from…
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Color and complement distance
Find a color's exact opposite on the hue wheel and measure how far apart the two really look: #336699 pairs with #996633 and scores as a strong harmony.
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Is color light or dark
White #ffffff scores a brightness of 255, above the 128 threshold, so it counts as light and should carry black text (#000000).
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Validate hex color
#336699cc is a valid hex color: eight hexadecimal digits, the full form with transparency. The check accepts three, four, six or eight digits, with or without…
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Lightest color in a list
From #000000, #808080 and #ffffff, the lightest is #ffffff at position 2 (counting from 0), with luminance 1.
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Sort colors by luminance
Put a set of hex colors in order from darkest to lightest by WCAG luminance: pure blue scores 0.0722 and lands just after black, while pure red at 0.2126 sits…
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Warm or cool color checker by hue angle
Paste #E85D04 and learn it is warm, because its hue lies far closer to red at 0 degrees than to cyan at 180.
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HWB to CMYK converter
Hue 0 with no whiteness and no blackness is pure red, which prints as cyan 0 %, magenta 100 %, yellow 100 % and black 0 %.
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Color palette contrast matrix
For #fff, #000, #777777 and #2563eb you see every pairing in one table: white on black reaches the maximum of 21, and each cell can be checked against 4.5 for…
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Caster sugar cups to grams converter
One US cup of caster sugar weighs 225 g, and half a cup 112.5 g. Enter whole, half or decimal cups from a sponge or meringue recipe and get the grams for your…
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Chocolate chips cups to grams converter
One and a half US cups of chocolate chips weigh 255 g, at a fixed 170 g per cup. Enter whole or decimal cups from an American recipe and get the grams for your…
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Maple syrup cups to grams converter
One US cup of maple syrup weighs 315 g in this converter: enter any amount, such as 1.5 cups, and read 472.5 g ready for a gram scale. Free in your browser.
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Whole Milk Cups to Grams Converter
1.5 cups of whole milk weigh 366 grams, at a fixed 244 g per US cup. Enter the cups from the recipe, decimals or zero included, and get a scale-ready weight…
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Whole wheat flour cups to grams converter
1.5 cups of whole wheat flour weigh 180 grams, at a fixed 120 g per US cup. Type the cups from an American recipe and get a metric weight for your bread dough…
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Brown sugar grams to cups converter
440 grams of packed brown sugar fill 2 US cups, at 220 grams per firmly packed cup. Enter the grams from your scale or the package and get the cup measure for…
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