Black text appears on dark blue background and is hard to read

Select Standard theme from Theme selector. In a course create a quiz. Create a question and TEST that the Question Box Window has white text against a dark blue background. With the page still open TEST all themes. Start off by adding &theme=afterburner at the end of the page URL, changing the theme name for each theme in Moodle core. Full list: afterburner, anomaly, arialist, base, binarius, boxxie, brick, canvas, formfactor, fusion, leatherbound, magazine, nimble, nonzero, overlay, serenity, sky_high, splash, standardold Please Note: to see both Base & Canvas themes you need Theme Designer Mode enabled. (under settings: Theme settings)