(a.) Having colors like those of the rainbow; iridescent.

burele chatoyant creamy delicate eggshell flat gloss iridal iridial iridian irisated irised light mellow moire mother-of-pearl nacre nacred nacreous nacry opalescent opaline opaloid pale pastel patinaed pavonian pavonine pearl-like pearlish pearly quiet rainbowlike rainbowy sad semigloss simple sober soft soft-colored soft-hued softened somber subdued subtle sweet tender tortoise-shell