#663D20
Closest named color: Mud Brown (#60460F). oklch(40.3% 0.072 54.4), rgb(102, 61, 32).
Aa
White text reads best on this color (9.31:1).
About this color
#663D20 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.072 and its hue 54°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.036 away. White text reads best on it, at 9.31:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #663D20 |
| RGB | rgb(102, 61, 32) |
| HSL | hsl(25, 52%, 26%) |
| OKLCH | oklch(40.3% 0.072 54.4) |
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 #663D20 | 9.31:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #663D20 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #663D20 text on white | 9.31:1 | AAA | Lc 91.3 | Preferred for body text |
| #663D20 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
#E6D5CB
oklch(88.4% 0.023 52.7)
-
Step 300
300
#D7BAA8
oklch(80.9% 0.042 53.8)
-
Step 400
400
#C29679
oklch(70.7% 0.067 54.8)
-
Step 500
500
#B27B56
oklch(63% 0.086 54.4)
-
Step 600
600
#9D643B
oklch(55.7% 0.093 55.2)
-
Step 700
700
#86522E
oklch(49% 0.086 54)
-
Step 800
800 (this color)
#663D20
oklch(40.3% 0.072 54.4)
-
Step 900
900
#593924
oklch(37.7% 0.056 53.5)
-
Step 950
950
#342215
oklch(27.1% 0.036 56.4)
#663D20 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) | #49411D | 0.056 |
| Deuteranopia (no green cones) | #534A20 | 0.050 |
| Tritanopia (no blue cones) | #703536 | 0.047 |
| Achromatopsia (no color) | #474747 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D20
#663D20
oklch(40.3% 0.072 54.4)
- #184E69
#184E69
oklch(40.2% 0.072 234.6)
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 #663D20, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.036
- Purple Brown #673A3F ΔE 0.048
- Chestnut #742802 ΔE 0.051
- Green Brown #544E03 ΔE 0.070
- Milk Chocolate #7F4E1E ΔE 0.072
- Brownish Purple #76424E ΔE 0.073
- Rust Brown #8B3103 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.076
Use #663D20 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.