Hi, I added a new "rgba" format to allow add alpha layer to rgb, so that color can be transparent:) #59
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Option demo:
Please.make_color({colors_returned:3, format:'rgba', alpha:0.9})
and this returns =>
["rgba(191,128,114,0.9)", "rgba(114,191,162,0.9)", "rgba(159,114,191,0.9)"]