Sienna in OKLCH
Sienna is the earthy, reddish-brown CSS named color #A0522D. Here it is in OKLCH, RGB and as a full tonal palette you can copy or tweak below. 100% in your browser - copy the values or a Tailwind v4 export.
About sienna
Sienna is a deep terracotta-brown that reads as grounded, artisanal and natural, which suits craft, pottery and heritage palettes. It sits at a lower-mid lightness with warm chroma, so the tonal scale pulls light clay tints and rich burnt-umber shades. Keep the hue and vary lightness for the range, then copy the OKLCH, HEX or RGB value.
Sienna in CSS: oklch(52.6% 0.115 44.6) · #a0522d · rgb(160 82 45)
Frequently Asked Questions
Sienna is rgb(160, 82, 45). The RGB, HEX (#A0522D) and OKLCH values are all shown in the readouts above and can be copied individually.
Sienna pairs well with cream, sage green and muted teal for an earthy palette. Use the tonal scale above to pull lighter terracotta tints and deep umber shades for depth.
Other colors in OKLCH
From the blog
APCA vs. WCAG: Navigating Color Contrast and Accessibility in 2026
Understand the mathematical differences between WCAG 2.2 and APCA contrast algorithms, and how to stay legally compliant while building beautiful UI.
Read →tutorialMigrating to Tailwind v4: How to Configure Custom OKLCH Color Themes
Learn how to move from Tailwind v3 to v4, replace tailwind.config.js with the new @theme directive, and build modern OKLCH color palettes.
Read →colorThe Science of Wide-Gamut Web Colors and Gamut Mapping
Discover why legacy HEX colors limit your design to sRGB, how modern Display-P3 screens work, and what browser chroma reduction means for your UI.
Read →