Following on a comment by OzanOzan, it seemed like I was using a wrong matrix to convert XYZ to RGB. Since sRGB is the default color space on the web (or is it?), I'm now using the correct matrix followed by a gamma correction function (a = 0.055).
Update 2
If use a gamma of 0.5 and extend the range of B-V color indexes to be from 4.7 to -0.5, I get red at one extreme but still no violet. Here's the updated fiddle.
Update 2
If use a gamma of 0.5 and extend the range of B-V color indexes to be from 4.7 to -0.5, I get red at one extreme but still no violet. Here's the updated fiddle.
Update
Following on a comment by Ozan, it seemed like I was using a wrong matrix to convert XYZ to RGB. Since sRGB is the default color space on the web (or is it?), I'm now using the correct matrix followed by a gamma correction function (a = 0.055).
I now get this nice color ramp,
but there's still no red/violet at the extremities.
Demo
There's also a fiddle now that you can play with.
Update
Following on a comment by Ozan, it seemed like I was using a wrong matrix to convert XYZ to RGB. Since sRGB is the default color space on the web (or is it?), I'm now using the correct matrix followed by a gamma correction function (a = 0.055).
I now get this nice color ramp,
but there's still no red/violet at the extremities.
Demo
There's also a fiddle now that you can play with.
