orange and ochre are holy colors, the colors that renunciants wear in India reportedly; & also white is holy. Whites, beiges, taupes, natural colors. It seems like deep, rich colors like purple, magenta, and royal blue are colors that Sikh people like (at least at the Gurdwara/temple I've visited), along with a whole range of, like, burnt or weathered versions of lighter blues and turquoises and lighter or more marginalized greens, as well as various shades of orange and yellow and saffron. Monochromatic, with different shades, and mostly solids but maybe a tiny bit of a pattern somewhere mixed in. IDK how any of this would work on a cover but this is what I've seen women wearing at Gurdwara so maybe that speaks to their sensibility and aesthetic, but then I wonder "Wait who is my book for--it's for English speakers, so why does what women wear at Gurdwara?" Maybe because that's one additional way in which the English-speaker can be introduced to this other world, this other culture, this other approach to life; or maybe there's a happy medium. Or maybe it should be more about what the reader aspires to? (How the reader conceptualizes liberation, contentment, purity, self-improvement, spiritual progress--what images and colors promote the dream of that for the potential readers of my book?) IDK.