In fact the mapping is different for each device depending on the exact wavelength of the R, G, and B emitters. The sRGB transfer function is also given on the Wikipedia page linked above. Unfortunately- there is no unique mapping that definitively converts a wavelength to a specific color that the eye perceives. The matrix of this linear transformation can be found in Wikipedia for sRGB, or at the Bruce Lindbloom's page that lists forward and backward matrices for more RGB color spaces. For example, the conversion to sRGB takes the three values $X,$ $Y,$ $Z$ as a vector, applies a particular linear transformation to this vector, and then applies the sRGB transfer function to each component of the resulting vector to yield the final gamma-compressed nonlinear values. The next step is to convert these values to the target color space. These CMFs give you a translation from spectral power density to CIE XYZ color space. Colors such as pink, brown, and magenta are absent from the visible. The visible spectrum does not contain all the colors that the human eye and brain can distinguish. The color ranges from violet through red, with violet having the shortest wavelength. Given a N-dimensional matrix wavelength with color values in nm, returns a RGB image with N+3 dimensions. This small region is known as visible light and has a wavelength range of 350-780 nm. For example, 400 gives 8300b5, a shade of violet.
WAVELENGTH COLOR CONVERTER FULL
Tables of numeric values of various CMFs including the CIE 1931 ones can be found e.g. Convert wavelength in nm into an RGB value set. Enter a wavelength in nanometers between 380 and 780 and get an approximate RGB value. As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different.
WAVELENGTH COLOR CONVERTER CODE
Convert red hex color code FF0000 to RGB color: Hex FF0000. Get the 2 right digits of the hex color code and convert to decimal value to get the blue color level.
R = \int_ f_n(\lambda)p(\lambda)\,d\lambda.$$ Get the 2 middle digits of the hex color code and convert to decimal value to get the green color level. In order to compute the excitation level, you can integrate the product of the sensitivity S C(λ) of each of the three color receptors with your spectral power distribution P(λ) to obtain the three RGB numbers: One way to tackle your challenge is to basically simulate what the eye does: you take the spectrum as input, calculate how much it would excite each of the three color receptors based on their sensitivity to different parts of the spectrum and then use the three resulting numbers as RGB corresponding to the spectrum. Human eye has three types of color receptors which respond differently to different parts of the spectrum.
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