How to edit plank theme RGBA Color values ?

Asked by Mushir

I'm trying to modify plank theme file but the RGBA color values format are no clear to me. It's something like this :
I'm familiar with CSS3 RGBA format but I need some help to understand theme RGBA Color values format

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Solved by:
Rico Tzschichholz
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Rico Tzschichholz (ricotz) said :

It is defined as R;;G;;B;;A with valid values in [0..255] which corresponds with the decimal interpretation of hexadecimal colors #RRGGBBAA with one byte per channel.

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Best Rico Tzschichholz (ricotz) said :

The previous comment was suppose to be an answer.

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Mushir (moshirhemdan) said :

Thanks Rico Tzschichholz, that solved my question.