#663A20
Closest named color: Mud Brown (#60460F). oklch(39.7% 0.073 50), rgb(102, 58, 32).
Aa
White text reads best on this color (9.58:1).
About this color
#663A20 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.073 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.044 away. White text reads best on it, at 9.58:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #663A20 |
| RGB | rgb(102, 58, 32) |
| HSL | hsl(22, 52%, 26%) |
| OKLCH | oklch(39.7% 0.073 50) |
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 #663A20 | 9.58:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #663A20 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #663A20 text on white | 9.58:1 | AAA | Lc 91.9 | Preferred for body text |
| #663A20 text on black | 2.19:1 | Fails | Lc -10.4 | 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 900.
-
Step 50
50
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E1
oklch(93.6% 0.015 48.6)
-
Step 200
200
#EBD4C8
oklch(88.6% 0.03 49.4)
-
Step 300
300
#DFB7A1
oklch(80.9% 0.055 50.4)
-
Step 400
400
#CE906E
oklch(70.7% 0.089 49.6)
-
Step 500
500
#BF7447
oklch(63.1% 0.112 50.5)
-
Step 600
600
#AB5B28
oklch(55.7% 0.122 50.1)
-
Step 700
700
#924A1A
oklch(49% 0.114 50.2)
-
Step 800
800
#773D18
oklch(42.7% 0.095 50)
-
Step 900
900 (this color)
#663A20
oklch(39.7% 0.073 50)
-
Step 950
950
#381F10
oklch(26.9% 0.046 50.7)
#663A20 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) | #463F1E | 0.062 |
| Deuteranopia (no green cones) | #514920 | 0.057 |
| Tritanopia (no blue cones) | #703134 | 0.046 |
| Achromatopsia (no color) | #454545 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A20
#663A20
oklch(39.7% 0.073 50)
- #0D4E67
#0D4E67
oklch(39.8% 0.074 229.9)
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 #663A20, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.044
- Purple Brown #673A3F ΔE 0.045
- Chestnut #742802 ΔE 0.045
- Brownish Purple #76424E ΔE 0.074
- Rust Brown #8B3103 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.075
- Green Brown #544E03 ΔE 0.077
- Milk Chocolate #7F4E1E ΔE 0.078
Use #663A20 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.