#663E08
Closest named color: Mud Brown (#60460F). oklch(40.2% 0.084 67.1), rgb(102, 62, 8).
Aa
White text reads best on this color (9.30:1).
About this color
#663E08 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 67°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.023 away. White text reads best on it, at 9.30:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #663E08 |
| RGB | rgb(102, 62, 8) |
| HSL | hsl(34, 85%, 22%) |
| OKLCH | oklch(40.2% 0.084 67.1) |
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 #663E08 | 9.30:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #663E08 | 2.25:1 | Fails | Lc 12.8 | Not readable |
| #663E08 text on white | 9.30:1 | AAA | Lc 91.2 | Preferred for body text |
| #663E08 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#D7BB9F
oklch(80.9% 0.05 67)
-
Step 400
400
#C2976B
oklch(70.6% 0.079 66.6)
-
Step 500
500
#B27D42
oklch(63.1% 0.1 67.1)
-
Step 600
600
#9D651F
oklch(55.5% 0.109 67.2)
-
Step 700
700
#865410
oklch(49.1% 0.101 67.8)
-
Step 800
800 (this color)
#663E08
oklch(40.2% 0.084 67.1)
-
Step 900
900
#593A17
oklch(37.7% 0.066 66.5)
-
Step 950
950
#34220F
oklch(27% 0.041 66)
#663E08 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) | #4B4100 | 0.053 |
| Deuteranopia (no green cones) | #544B09 | 0.048 |
| Tritanopia (no blue cones) | #703434 | 0.066 |
| Achromatopsia (no color) | #474747 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E08
#663E08
oklch(40.2% 0.084 67.1)
- #1C4B73
#1C4B73
oklch(40.1% 0.085 247.6)
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 #663E08, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.023
- Chestnut #742802 ΔE 0.056
- Green Brown #544E03 ΔE 0.056
- Olive Brown #645403 ΔE 0.064
- Milk Chocolate #7F4E1E ΔE 0.069
- Purple Brown #673A3F ΔE 0.070
- Medium Brown #7F5112 ΔE 0.074
- Rust Brown #8B3103 ΔE 0.077
Use #663E08 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.