#66291A
Closest named color: Chestnut (#742802). oklch(36.5% 0.092 35), rgb(102, 41, 26).
Aa
White text reads best on this color (11.06:1).
About this color
#66291A is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.092 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.034 away. White text reads best on it, at 11.06:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.092) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #66291A |
| RGB | rgb(102, 41, 26) |
| HSL | hsl(12, 59%, 25%) |
| OKLCH | oklch(36.5% 0.092 35) |
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 #66291A | 11.06:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #66291A | 1.89:1 | Fails | Lc 8.9 | Not readable |
| #66291A text on white | 11.06:1 | AAA | Lc 95.0 | Preferred for body text |
| #66291A 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
#FBF3F1
oklch(97% 0.009 34.3)
-
Step 100
100
#F7E6E1
oklch(93.7% 0.02 37)
-
Step 200
200
#F1D1C8
oklch(88.5% 0.038 36.2)
-
Step 300
300
#E9B1A3
oklch(80.8% 0.069 34.5)
-
Step 400
400
#DC8771
oklch(70.8% 0.11 35.3)
-
Step 500
500
#D0664B
oklch(63.1% 0.141 35.4)
-
Step 600
600
#BC4A2E
oklch(55.7% 0.153 35)
-
Step 700
700
#A13A20
oklch(49.1% 0.142 35.1)
-
Step 800
800
#83311D
oklch(42.7% 0.118 34.9)
-
Step 900
900 (this color)
#66291A
oklch(36.5% 0.092 35)
-
Step 950
950
#3E1B12
oklch(27.1% 0.057 35.5)
#66291A 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) | #393318 | 0.093 |
| Deuteranopia (no green cones) | #484118 | 0.086 |
| Tritanopia (no blue cones) | #701C26 | 0.039 |
| Achromatopsia (no color) | #3C3C3C | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66291A
#66291A
oklch(36.5% 0.092 35)
- #004754
#004754
oklch(36.6% 0.065 215.1)
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 #66291A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.034
- Reddy Brown #6E1005 ΔE 0.041
- Blood #770001 ΔE 0.057
- Purple Brown #673A3F ΔE 0.057
- Claret #680018 ΔE 0.063
- Maroon #800000 ΔE 0.065
- Wine Red #7B0323 ΔE 0.066
- Bordeaux #7B002C ΔE 0.075
Use #66291A 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.