#66291D
Closest named color: Chestnut (#742802). oklch(36.6% 0.091 32.8), rgb(102, 41, 29).
Aa
White text reads best on this color (11.05:1).
About this color
#66291D is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.036 away. White text reads best on it, at 11.05:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #66291D |
| RGB | rgb(102, 41, 29) |
| HSL | hsl(10, 56%, 26%) |
| OKLCH | oklch(36.6% 0.091 32.8) |
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 #66291D | 11.05:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #66291D | 1.89:1 | Fails | Lc 8.9 | Not readable |
| #66291D text on white | 11.05:1 | AAA | Lc 95.0 | Preferred for body text |
| #66291D text on black | 1.89:1 | Fails | Lc -7.6 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D1C9
oklch(88.5% 0.038 34.3)
-
Step 300
300
#E9B1A5
oklch(80.9% 0.068 32.3)
-
Step 400
400
#DC8674
oklch(70.6% 0.11 32.6)
-
Step 500
500
#D06550
oklch(63.1% 0.14 32.6)
-
Step 600
600
#BB4933
oklch(55.5% 0.152 32.8)
-
Step 700
700
#A13A26
oklch(49.1% 0.141 33)
-
Step 800
800
#833121
oklch(42.8% 0.117 32.9)
-
Step 900
900 (this color)
#66291D
oklch(36.6% 0.091 32.8)
-
Step 950
950
#3E1A13
oklch(26.9% 0.058 32.4)
#66291D 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) | #39341C | 0.093 |
| Deuteranopia (no green cones) | #48411C | 0.085 |
| Tritanopia (no blue cones) | #701D26 | 0.035 |
| Achromatopsia (no color) | #3C3C3C | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66291D
#66291D
oklch(36.6% 0.091 32.8)
- #004753
#004753
oklch(36.6% 0.064 213.6)
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 #66291D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.036
- Reddy Brown #6E1005 ΔE 0.042
- Purple Brown #673A3F ΔE 0.054
- Blood #770001 ΔE 0.057
- Claret #680018 ΔE 0.062
- Wine Red #7B0323 ΔE 0.064
- Maroon #800000 ΔE 0.065
- Bordeaux #7B002C ΔE 0.073
Use #66291D 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.