#66271D
Closest named color: Chestnut (#742802). oklch(36.3% 0.093 31.1), rgb(102, 39, 29).
Aa
White text reads best on this color (11.21:1).
About this color
#66271D is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.093 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.037 away. White text reads best on it, at 11.21:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.87:1 |
| White text | 11.21:1 |
Values
| HEX | #66271D |
| RGB | rgb(102, 39, 29) |
| HSL | hsl(8, 56%, 26%) |
| OKLCH | oklch(36.3% 0.093 31.1) |
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 #66271D | 11.21:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #66271D | 1.87:1 | Fails | Lc 8.6 | Not readable |
| #66271D text on white | 11.21:1 | AAA | Lc 95.3 | Preferred for body text |
| #66271D text on black | 1.87:1 | Fails | Lc -7.3 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EAB0A5
oklch(80.8% 0.07 30.8)
-
Step 400
400
#DD8575
oklch(70.6% 0.112 31.1)
-
Step 500
500
#D26451
oklch(63.2% 0.143 31.4)
-
Step 600
600
#BD4735
oklch(55.6% 0.156 31.2)
-
Step 700
700
#A33828
oklch(49.2% 0.145 31.2)
-
Step 800
800
#842F22
oklch(42.7% 0.12 31.2)
-
Step 900
900 (this color)
#66271D
oklch(36.3% 0.093 31.1)
-
Step 950
950
#3F1A14
oklch(27.1% 0.059 30.8)
#66271D 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) | #38321C | 0.095 |
| Deuteranopia (no green cones) | #47401B | 0.089 |
| Tritanopia (no blue cones) | #701A25 | 0.035 |
| Achromatopsia (no color) | #3B3B3B | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66271D
#66271D
oklch(36.3% 0.093 31.1)
- #004651
#004651
oklch(36.2% 0.063 212.4)
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 #66271D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.037
- Reddy Brown #6E1005 ΔE 0.038
- Blood #770001 ΔE 0.054
- Claret #680018 ΔE 0.057
- Purple Brown #673A3F ΔE 0.057
- Wine Red #7B0323 ΔE 0.061
- Maroon #800000 ΔE 0.063
- Bordeaux #7B002C ΔE 0.070
Use #66271D 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.