#664f21
a dark, vivid yellow · warm · closest name: sienna
RGB
102, 79, 33
HSL
40°, 51%, 27%
CMYK
0, 23, 68, 60
Luminance
0.0853
Every format
| HEX | #664f21 |
| RGB | rgb(102, 79, 33) |
| HSL | hsl(40, 51%, 27%) |
| CMYK | cmyk(0%, 23%, 68%, 60%) |
| LAB | lab(35.1 4.0 30.2) |
| LCH | lch(35.1 30.4 82.5) |
| OKLCH | oklch(0.442 0.070 82.4) |
Copy-ready code
/* CSS */
color: #664f21;
background-color: #664f21;
/* Tailwind (arbitrary) */
class="text-[#664f21] bg-[#664f21]"
/* SCSS */
$brand: #664f21;
/* SwiftUI */
Color(red: 0.400, green: 0.310, blue: 0.129)
/* Android */
Color.parseColor("#664f21")Accessibility — WCAG contrast
Aa
#664f21 on white: 7.76:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#664f21 on black: 2.71:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red40.0%
Green31.0%
Blue12.9%
CMYK percentages
Cyan0.0%
Magenta22.5%
Yellow67.6%
Key (black)60.0%
Color previews
#664f21 text on a black background
contrast 2.71:1
Card sample
#664f21 text on a white background
contrast 7.76:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #664f21;
Background color
Panel with #664f21 background
background-color: #664f21;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #664f21;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(102, 79, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(102, 79, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #664f21; background: linear-gradient(135deg, #664f21, #4F6621);