I often use external reference (like 2D sci-fi or fantasy art) to create my color schemes.
More often I use reference just as an inspiration for a color combo or an atmosphere. But sometimes, when the reference is a perfect match, I copy the colors almost 100%.
The latter was the case with Ghulams.
I was browsing ideas and found this incredible character design by thomaswievegg
. It is sci-fi, it radiates "space mercenary" feel, it has color combination currently not used in any Infinity army, and also colors I would like to explore.
Sand and Ivory armor plates were still alluding to Haqqislam, but orange, turquoise, reddish-brown and blue-grey drastically changed overall look.
Of course the scheme needed some alterations to look catchy on the table, but that mostly just meant increasing the saturation and contrast here and there.