My colorset

[Jasa 12265]

i am creating my own colorset but i just started creating add-ons so i thounght i would do something easy like a colorset.
how do you make colors transparent?
how do you make colors lghter and darker?

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[Hellriot]

Code: [Select]

0.388 0.000 0.118 0.700
This is transparent dark red.

0.700 makes it transparent.