#3E1570 Hex Color

Muted gold and dusty mauve flatter this purple best, since both share its dim, low-key character. Bright yellow also works, but only as a small accent.

Yes. White text on #3e1570 reaches about 13.6:1 contrast, well above the 4.5:1 WCAG AA threshold for body copy. Dark text on it fails, so keep type light.