#66251E
Closest named color: Reddy Brown (#6E1005). oklch(36% 0.095 28.8), rgb(102, 37, 30).
Aa
White text reads best on this color (11.36:1).
About this color
#66251E is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.095 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.036 away. White text reads best on it, at 11.36:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.095) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.84:1 |
| White text | 11.36:1 |
Values
| HEX | #66251E |
| RGB | rgb(102, 37, 30) |
| HSL | hsl(6, 55%, 26%) |
| OKLCH | oklch(36% 0.095 28.8) |
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 #66251E | 11.36:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #66251E | 1.84:1 | Fails | Lc 8.3 | Not readable |
| #66251E text on white | 11.36:1 | AAA | Lc 95.6 | Preferred for body text |
| #66251E text on black | 1.84:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EBB0A6
oklch(80.9% 0.071 29.6)
-
Step 400
400
#DF8477
oklch(70.7% 0.115 28.9)
-
Step 500
500
#D36254
oklch(63.1% 0.146 29)
-
Step 600
600
#BF4539
oklch(55.7% 0.159 28.8)
-
Step 700
700
#A4352B
oklch(49.1% 0.148 28.7)
-
Step 800
800
#852D25
oklch(42.6% 0.122 28.5)
-
Step 900
900 (this color)
#66251E
oklch(36% 0.095 28.8)
-
Step 950
950
#3F1915
oklch(26.9% 0.06 27.9)
#66251E 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) | #36311D | 0.100 |
| Deuteranopia (no green cones) | #463F1C | 0.092 |
| Tritanopia (no blue cones) | #701724 | 0.033 |
| Achromatopsia (no color) | #3A3A3A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66251E
#66251E
oklch(36% 0.095 28.8)
- #00464E
#00464E
oklch(36% 0.062 207.7)
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 #66251E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.036
- Chestnut #742802 ΔE 0.041
- Blood #770001 ΔE 0.051
- Claret #680018 ΔE 0.052
- Wine Red #7B0323 ΔE 0.058
- Purple Brown #673A3F ΔE 0.059
- Maroon #800000 ΔE 0.062
- Burgundy #610023 ΔE 0.065
Use #66251E 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.