#663D1E
Closest named color: Mud Brown (#60460F). oklch(40.2% 0.073 55.9), rgb(102, 61, 30).
Aa
White text reads best on this color (9.32:1).
About this color
#663D1E is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.073 and its hue 56°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.035 away. White text reads best on it, at 9.32:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #663D1E |
| RGB | rgb(102, 61, 30) |
| HSL | hsl(26, 55%, 26%) |
| OKLCH | oklch(40.2% 0.073 55.9) |
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 #663D1E | 9.32:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #663D1E | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #663D1E text on white | 9.32:1 | AAA | Lc 91.3 | Preferred for body text |
| #663D1E text on black | 2.25:1 | Fails | Lc -11.0 | 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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F1E8E2
oklch(93.6% 0.013 56.2)
-
Step 200
200
#E6D6CB
oklch(88.6% 0.023 56.9)
-
Step 300
300
#D7BAA7
oklch(80.9% 0.042 55.2)
-
Step 400
400
#C29678
oklch(70.7% 0.068 55.6)
-
Step 500
500
#B27B54
oklch(63% 0.087 55.7)
-
Step 600
600
#9D6439
oklch(55.6% 0.094 56.3)
-
Step 700
700
#86522B
oklch(49% 0.088 55.7)
-
Step 800
800 (this color)
#663D1E
oklch(40.2% 0.073 55.9)
-
Step 900
900
#593923
oklch(37.7% 0.057 54.6)
-
Step 950
950
#342215
oklch(27.1% 0.036 56.4)
#663D1E 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) | #49411B | 0.056 |
| Deuteranopia (no green cones) | #534A1E | 0.050 |
| Tritanopia (no blue cones) | #703436 | 0.051 |
| Achromatopsia (no color) | #474747 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D1E
#663D1E
oklch(40.2% 0.073 55.9)
- #184E6A
#184E6A
oklch(40.3% 0.073 235.6)
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 #663D1E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.035
- Purple Brown #673A3F ΔE 0.051
- Chestnut #742802 ΔE 0.051
- Green Brown #544E03 ΔE 0.068
- Milk Chocolate #7F4E1E ΔE 0.071
- Rust Brown #8B3103 ΔE 0.074
- Olive Brown #645403 ΔE 0.075
- Brownish Purple #76424E ΔE 0.075
Use #663D1E 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.