#66181D
Closest named color: Claret (#680018). oklch(34.3% 0.11 21.9), rgb(102, 24, 29).
Aa
White text reads best on this color (12.25:1).
About this color
#66181D is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.110 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.027 away. White text reads best on it, at 12.25:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.110) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.71:1 |
| White text | 12.25:1 |
Values
| HEX | #66181D |
| RGB | rgb(102, 24, 29) |
| HSL | hsl(356, 62%, 25%) |
| OKLCH | oklch(34.3% 0.11 21.9) |
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 #66181D | 12.25:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #66181D | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #66181D text on white | 12.25:1 | AAA | Lc 96.9 | Preferred for body text |
| #66181D text on black | 1.71:1 | Fails | Lc 0.0 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F2ACA9
oklch(81% 0.083 21.8)
-
Step 400
400
#E77D7B
oklch(70.7% 0.131 22.1)
-
Step 500
500
#DD5659
oklch(63.1% 0.169 22)
-
Step 600
600
#C8343F
oklch(55.5% 0.184 21.8)
-
Step 700
700
#AD2531
oklch(49.2% 0.171 22)
-
Step 800
800
#8C2229
oklch(42.7% 0.141 22.2)
-
Step 900
900 (this color)
#66181D
oklch(34.3% 0.11 21.9)
-
Step 950
950
#421616
oklch(27% 0.069 22.8)
#66181D 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) | #2E2A1D | 0.120 |
| Deuteranopia (no green cones) | #423B1B | 0.109 |
| Tritanopia (no blue cones) | #71001B | 0.030 |
| Achromatopsia (no color) | #353535 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66181D
#66181D
oklch(34.3% 0.11 21.9)
- #004145
#004145
oklch(34.2% 0.058 201.7)
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 #66181D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.027
- Reddy Brown #6E1005 ΔE 0.027
- Burgundy #610023 ΔE 0.041
- Blood #770001 ΔE 0.042
- Wine Red #7B0323 ΔE 0.048
- Bordeaux #7B002C ΔE 0.054
- Maroon #800000 ΔE 0.058
- Chestnut #742802 ΔE 0.058
Use #66181D 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.