color gets updated!

 

CIELAB color space top view

Hello everybody, here is the updated version of my V package color. I have added some new functionality, and today I will talk you through how that went!

So, I realise that my last iteration did not have HSL, or alpha channels. So I added them in. The way I implemented alpha channels is that the RGB and HSL structs now have an optional alpha channel, which is specified to 2 decimal places and resides in an f64. Conversion with alpha values was also implemented between any alpha supporting formats, though I am yet to implement alpha conversion with CMYK.

However, that was the easy part, I felt, of the changes! The next thing I did was check Wikipedia for a list of CSS colors (well, at least CSS4 colors). One that came up was CIELAB, a format covering the whole gamut of human vision. This required an intermediary format, XYZ, but I thought I would, as it seemed interesting and would surely be a boost to my library's usage. It took quite a while, but I eventually got it working. 

One particularly interesting thing about CIELAB is the fact that there are different reference values for the conversion process. While I chose the standard, apparently the printing industry use different values!

Here are the ones I chose:

Xₙ - 95.047

Yₙ - 100.0

Zₙ - 108.883

The next format I planned to implement was AdobeRGB, which has a larger gamut than sRGB, which is the one previously implemented. This one again leveraged the XYZ intermediary format, which simplified matters! Conversion was now implemented.

Do you have a favourite format? If so, comment your answer