#663E0D
Closest named color: Mud Brown (#60460F). oklch(40.3% 0.082 65.7), rgb(102, 62, 13).
Aa
White text reads best on this color (9.29:1).
About this color
#663E0D is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.082 and its hue 66°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.024 away. White text reads best on it, at 9.29:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.082) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #663E0D |
| RGB | rgb(102, 62, 13) |
| HSL | hsl(33, 77%, 23%) |
| OKLCH | oklch(40.3% 0.082 65.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #663E0D | 9.29:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #663E0D | 2.25:1 | Fails | Lc 12.8 | Not readable |
| #663E0D text on white | 9.29:1 | AAA | Lc 91.2 | Preferred for body text |
| #663E0D text on black | 2.25:1 | Fails | Lc -11.2 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F9F5F1
oklch(97.2% 0.007 67.7)
-
Step 100
100
#F1E8E0
oklch(93.6% 0.015 64.3)
-
Step 200
200
#E6D6C7
oklch(88.5% 0.027 65.6)
-
Step 300
300
#D7BBA1
oklch(80.9% 0.048 65)
-
Step 400
400
#C2976D
oklch(70.7% 0.077 65.4)
-
Step 500
500
#B27D45
oklch(63.2% 0.098 65.9)
-
Step 600
600
#9D6524
oklch(55.6% 0.107 65.9)
-
Step 700
700
#865416
oklch(49.2% 0.099 66.4)
-
Step 800
800 (this color)
#663E0D
oklch(40.3% 0.082 65.7)
-
Step 900
900
#593A19
oklch(37.7% 0.064 65.2)
-
Step 950
950
#342210
oklch(27% 0.04 64.6)
#663E0D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4B4105 | 0.053 |
| Deuteranopia (no green cones) | #544B0E | 0.048 |
| Tritanopia (no blue cones) | #703535 | 0.063 |
| Achromatopsia (no color) | #474747 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E0D
#663E0D
oklch(40.3% 0.082 65.7)
- #1C4C72
#1C4C72
oklch(40.3% 0.082 245.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #663E0D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.024
- Chestnut #742802 ΔE 0.055
- Green Brown #544E03 ΔE 0.058
- Olive Brown #645403 ΔE 0.065
- Purple Brown #673A3F ΔE 0.067
- Milk Chocolate #7F4E1E ΔE 0.069
- Medium Brown #7F5112 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.076
Use #663E0D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.