#663111
Closest named color: Chestnut (#742802). oklch(37.8% 0.088 48.4), rgb(102, 49, 17).
Aa
White text reads best on this color (10.43:1).
About this color
#663111 is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.088 and its hue 48°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.031 away. White text reads best on it, at 10.43:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.01:1 |
| White text | 10.43:1 |
Values
| HEX | #663111 |
| RGB | rgb(102, 49, 17) |
| HSL | hsl(23, 71%, 23%) |
| OKLCH | oklch(37.8% 0.088 48.4) |
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 #663111 | 10.43:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #663111 | 2.01:1 | Fails | Lc 10.1 | Not readable |
| #663111 text on white | 10.43:1 | AAA | Lc 93.8 | Preferred for body text |
| #663111 text on black | 2.01:1 | 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
#F5E6DF
oklch(93.5% 0.019 46.8)
-
Step 200
200
#EED3C5
oklch(88.6% 0.036 49.2)
-
Step 300
300
#E5B59C
oklch(81% 0.066 48.9)
-
Step 400
400
#D68C65
oklch(70.7% 0.105 48.3)
-
Step 500
500
#C96D38
oklch(63% 0.134 48.4)
-
Step 600
600
#B5530C
oklch(55.7% 0.146 48.4)
-
Step 700
700
#9A4300
oklch(49% 0.133 48.1)
-
Step 800
800
#7E3705
oklch(42.6% 0.113 48)
-
Step 900
900 (this color)
#663111
oklch(37.8% 0.088 48.4)
-
Step 950
950
#3C1D0C
oklch(27% 0.056 47.7)
#663111 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) | #40380D | 0.077 |
| Deuteranopia (no green cones) | #4D4410 | 0.070 |
| Tritanopia (no blue cones) | #70262A | 0.049 |
| Achromatopsia (no color) | #404040 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663111
#663111
oklch(37.8% 0.088 48.4)
- #004961
#004961
oklch(37.9% 0.074 228.4)
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 #663111, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.031
- Purple Brown #673A3F ΔE 0.058
- Mud Brown #60460F ΔE 0.059
- Reddy Brown #6E1005 ΔE 0.060
- Blood #770001 ΔE 0.073
- Rust Brown #8B3103 ΔE 0.077
- Red Brown #8B2E16 ΔE 0.077
- Maroon #800000 ΔE 0.077
Use #663111 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.