The main difference between Umber and Sienna is brightness and saturation: both are orange shades, but Sienna is lighter and Sienna is more saturated. Umber and Sienna are often confused but have distinct differences in hue, saturation, and tone. Umber (#635147) and Sienna (#A0522D) each suit different design contexts — understanding their differences helps you choose the right color for your project.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Sienna is more saturated (56% HSL vs 16%) so it reads as bolder and more memorable at logo scale, while Umber can feel washed out when printed small.
Umber hits a 7.50:1 WCAG contrast against white — safer for text-heavy interfaces — where Sienna only reaches 5.62:1 and risks failing AA at small body sizes.
Sienna is a warm tone that flatters spring/summer collections and warmer skin undertones, while Umber leans warmer and is better suited to autumn/winter layering.
Umber is the more muted of the two (16% saturation) and sits more calmly on large wall surfaces, while Sienna's higher chroma can overwhelm a room when used beyond accent pieces.
Umber (#635147) is a dark, muted orange with a warm undertone — it feels rich, serious, substantial and subdued, sophisticated.
Sienna (#A0522D) is a medium, moderately saturated orange with a warm undertone — it feels balanced, versatile and balanced in intensity.
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.