Judge each color against its actual background and state, not a palette swatch on white. Use Color Contrast Checker for text, icons, and controls, then inspect normal, hover, disabled, and selected states.
Keep meaning visible without color alone: pair warnings with labels or icons. Bright saturated colors can feel harsh on a near-black surface even when contrast is sufficient, so check visual comfort as well as legibility at small sizes.
Which foreground and background pair needs review?