RGB to decimal integer

This capability converts either way: send a hex code or an RGB triple with direction to_int to obtain the decimal, or send a decimal in the legal 0 to 16777215 range with direction from_int to recover channels and a normalised hex code.

Packing RGB or hex into a 24-bit decimal integer

The required color field accepts the same shapes designers and developers type every day: a six-digit hex code with or without a leading hash such as #FF8000 or FF8000, a three-digit CSS shorthand such as #f80 which expands by doubling each digit, an optional 0x prefix for hex, a comma-separated triple like 255,128,0, or a CSS rgb function form such as rgb(255, 128, 0). Internally the engine multiplies red by sixty-five thousand five hundred thirty-six, multiplies green by two hundred fifty-six, and adds blue—equivalently the bit formula red shifted left sixteen bits, or green shifted left eight bits, or blue—yielding a unique integer between zero and sixteen million seven hundred seventy-seven thousand two hundred fifteen. Pure black packs to zero, pure white to the maximum, and brand oranges such as #FF8000 become one six seven four four four four eight. Choose direction to_int when you already have a colour and need a single packed number. Each channel must be an integer from zero to two hundred fifty-five inclusive; out-of-range channels and malformed hex lengths fail with invalid_input and are not charged. Aliases value, input, hex, n, and rgb map to the same color field when clients prefer those names. Direction aliases to_decimal, rgb_to_int, and encode select the same packing path so you can match vocabulary used in your codebase. Identical inputs always produce identical JSON because the path is pure arithmetic with no network, no random seed, and no wall clock.

Unpacking a decimal integer back to RGB and hex

The legal range is zero through sixteen million seven hundred seventy-seven thousand two hundred fifteen inclusive—the full 24-bit unsigned span. On success the engine extracts red as the value shifted right sixteen bits masked to eight bits, green as the value shifted right eight bits masked to eight bits, and blue as the low eight bits. Choose direction from_int when a pipeline hands you a packed colour integer and you need channels or a CSS-ready hex string. Place the integer in the color field as a decimal digit string or a JSON number, or as a 0x-prefixed hex literal. An integer above 16777215 is rejected with invalid_input that names the maximum so callers can fix the bug without guessing; negative integers are likewise rejected. The response echoes those channels as r, g, and b, nests them under an rgb object, builds a hash-prefixed six-digit uppercase hex field, exposes hex_digits without the hash, and supplies a css_rgb string such as rgb(255, 128, 0) for stylesheets. The same numeric value appears under decimal, integer, and rgb_int so UI code, SDK demos, and graders can pick whichever name fits without remapping. The method label is int_to_rgb for unpack and rgb_to_int for pack, and max is always 16777215 for documentation in clients. Direction aliases from_decimal, int_to_rgb, and decode select the unpack path.

API usage, pricing, workflows, and practical limits

Call the free in-browser RGB to decimal integer converter for design checks, game-tool demos, and quick mental verification without installing colour libraries. Authors shipping SDKs can map decimal and hex fields directly into forms that show a swatch beside the integer—the same mental model artists see when a binary file stores colours as 24-bit packed RGB. Keep integers inside the published 24-bit range; wider colour spaces and alpha channels are out of scope for this product intent. Send a JSON body with required fields color and direction. Use the prepaid API when a theme pipeline, sprite sheet generator, accessibility tooling suite, or multiplayer asset service needs a stable contract under KIT balance at $0.002 per successful item; validation failures never consume balance after the engine rejects the request. Pair this endpoint with RGB to HSL or hex to HSL converters when the next step is perceptual adjustment, or with colour contrast checks when the packed integer feeds a WCAG workflow after unpacking.