#663108
Closest named color: Chestnut (#742802). oklch(37.7% 0.091 52), rgb(102, 49, 8).
Aa
White text reads best on this color (10.45:1).
About this color
#663108 is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.091 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.032 away. White text reads best on it, at 10.45:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #663108 |
| RGB | rgb(102, 49, 8) |
| HSL | hsl(26, 85%, 22%) |
| OKLCH | oklch(37.7% 0.091 52) |
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 #663108 | 10.45:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #663108 | 2.00:1 | Fails | Lc 10.1 | Not readable |
| #663108 text on white | 10.45:1 | AAA | Lc 93.8 | Preferred for body text |
| #663108 text on black | 2.00:1 | Fails | Lc -8.7 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E7DE
oklch(93.7% 0.02 55.1)
-
Step 200
200
#EED3C3
oklch(88.5% 0.037 52.7)
-
Step 300
300
#E5B599
oklch(80.9% 0.068 51.7)
-
Step 400
400
#D68C5F
oklch(70.6% 0.109 51.5)
-
Step 500
500
#CA6E2D
oklch(63.2% 0.139 52.1)
-
Step 600
600
#B25600
oklch(55.7% 0.143 52.2)
-
Step 700
700
#964700
oklch(49% 0.126 51.9)
-
Step 800
800
#7C3A00
oklch(42.8% 0.11 52.3)
-
Step 900
900 (this color)
#663108
oklch(37.7% 0.091 52)
-
Step 950
950
#3C1D08
oklch(27% 0.058 51.7)
#663108 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) | #413802 | 0.076 |
| Deuteranopia (no green cones) | #4D4407 | 0.070 |
| Tritanopia (no blue cones) | #712529 | 0.056 |
| Achromatopsia (no color) | #3F3F3F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663108
#663108
oklch(37.7% 0.091 52)
- #004863
#004863
oklch(37.7% 0.077 231.8)
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 #663108, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.032
- Mud Brown #60460F ΔE 0.057
- Reddy Brown #6E1005 ΔE 0.062
- Purple Brown #673A3F ΔE 0.064
- Blood #770001 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.077
- Red Brown #8B2E16 ΔE 0.079
- Maroon #800000 ΔE 0.079
Use #663108 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.