The main difference between Mustard and Ivory is hue — Mustard is a warm yellow, while Ivory is a cool-leaning off-white. Mustard (#FFDB58) has an HSL of 47°, 100%, 67%, whereas Ivory (#FFFFF0) sits at 60°, 100%, 97%.
Mustard (#FFDB58) is a light, vivid yellow with a warm undertone — it feels airy, soft, approachable and bright, energetic, eye-catching.
Ivory (#FFFFF0) is a very light, vivid off-white with a cool-leaning undertone — it feels pale, delicate, gentle and bright, energetic, eye-catching.
Text legibility depends on the contrast ratio between foreground and background. WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Use these numbers to choose accessible combinations for your design.
Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.