Tool to convert a color into a number and a number into a color (physical or numerical values) as wavelength, frequency, energy (eV), temperature (Kelvin), hue, RGB, HTML Hex code, 24-bit, Pantone, ANSI, CGA, etc.
Color in Number - dCode
Tag(s) : Physics-Chemistry, Informatics
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Color in Number
Number to Color Converter
Color to Number Converter
Answers to Questions (FAQ)
What is a number for a color? (Definition)
A visible color can have various numerical representations, whether physical (such as wavelength or photon energy), computer-based (such as RGB code, hexadecimal code, or ANSI/CGA standards), or for indexing purposes (Pantone color chart, etc.).
How to convert a color to a number?
If the number is based on a computer value, the conversion can be straightforward: any color displayed on a screen is generally composed of three integers for red, green, and blue, encoded using 256 values.
Example: A 24-bit integer (3 times 8 bits) can represent any color for computer media. Color is often represented by a 6-digit hexadecimal code #abcdef (used in HTML)
If the number is based on a physical value, dCode will compare the color with its approximate physical representation.
dCode uses a colorimetric distance (Delta E) hue matching algorithm to suggest the closest color to a given color.
Why are some conversions inaccurate?
— Some numbers (such as Pantone color chart or Kelvin temperature) depend on the lighting context or the display medium.
— The visible spectrum is not linear, and digital models are limited to human trichromatic vision.
— Physical conversions (wavelength, frequency, electron volt) do not cover non-spectral colors (white, gray, black).
Source code
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