#663B22
Closest named color: Mud Brown (#60460F). oklch(39.9% 0.072 49.8), rgb(102, 59, 34).
Aa
White text reads best on this color (9.48:1).
About this color
#663B22 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.072 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.043 away. White text reads best on it, at 9.48:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #663B22 |
| RGB | rgb(102, 59, 34) |
| HSL | hsl(22, 50%, 27%) |
| OKLCH | oklch(39.9% 0.072 49.8) |
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 #663B22 | 9.48:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #663B22 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #663B22 text on white | 9.48:1 | AAA | Lc 91.7 | Preferred for body text |
| #663B22 text on black | 2.21:1 | Fails | Lc -10.7 | 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
#EAD4C8
oklch(88.5% 0.03 50.6)
-
Step 300
300
#DEB7A2
oklch(80.8% 0.054 49.9)
-
Step 400
400
#CD9170
oklch(70.8% 0.086 49.7)
-
Step 500
500
#BE744A
oklch(63% 0.109 49.4)
-
Step 600
600
#AA5B2B
oklch(55.6% 0.12 49.3)
-
Step 700
700
#914B1E
oklch(49.1% 0.11 50)
-
Step 800
800
#763E1B
oklch(42.7% 0.091 50)
-
Step 900
900 (this color)
#663B22
oklch(39.9% 0.072 49.8)
-
Step 950
950
#381F11
oklch(26.9% 0.046 49.2)
#663B22 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) | #474020 | 0.060 |
| Deuteranopia (no green cones) | #514922 | 0.054 |
| Tritanopia (no blue cones) | #703335 | 0.044 |
| Achromatopsia (no color) | #464646 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663B22
#663B22
oklch(39.9% 0.072 49.8)
- #114E66
#114E66
oklch(39.8% 0.071 229.6)
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 #663B22, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.043
- Purple Brown #673A3F ΔE 0.044
- Chestnut #742802 ΔE 0.048
- Brownish Purple #76424E ΔE 0.072
- Rust Brown #8B3103 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.075
- Green Brown #544E03 ΔE 0.076
- Milk Chocolate #7F4E1E ΔE 0.076
Use #663B22 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.