#66301E
Closest named color: Chestnut (#742802). oklch(37.8% 0.083 38.9), rgb(102, 48, 30).
Aa
White text reads best on this color (10.46:1).
About this color
#66301E is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.083 and its hue 39°. 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 10.46:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.083) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #66301E |
| RGB | rgb(102, 48, 30) |
| HSL | hsl(15, 55%, 26%) |
| OKLCH | oklch(37.8% 0.083 38.9) |
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 #66301E | 10.46:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #66301E | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #66301E text on white | 10.46:1 | AAA | Lc 93.9 | Preferred for body text |
| #66301E text on black | 2.00:1 | Fails | Lc -8.6 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EFD2C9
oklch(88.6% 0.035 38)
-
Step 300
300
#E5B4A3
oklch(81% 0.062 40)
-
Step 400
400
#D68B72
oklch(70.8% 0.099 39.2)
-
Step 500
500
#C96B4C
oklch(63% 0.128 38.9)
-
Step 600
600
#B5512F
oklch(55.6% 0.139 38.9)
-
Step 700
700
#9B4122
oklch(49.1% 0.128 38.8)
-
Step 800
800
#7E361E
oklch(42.7% 0.107 38.6)
-
Step 900
900 (this color)
#66301E
oklch(37.8% 0.083 38.9)
-
Step 950
950
#3C1C12
oklch(26.9% 0.053 38.1)
#66301E 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) | #3E381C | 0.081 |
| Deuteranopia (no green cones) | #4B441D | 0.074 |
| Tritanopia (no blue cones) | #70262C | 0.039 |
| Achromatopsia (no color) | #3F3F3F | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66301E
#66301E
oklch(37.8% 0.083 38.9)
- #004A5A
#004A5A
oklch(37.8% 0.068 218.5)
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 #66301E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.034
- Purple Brown #673A3F ΔE 0.047
- Reddy Brown #6E1005 ΔE 0.056
- Mud Brown #60460F ΔE 0.068
- Blood #770001 ΔE 0.069
- Maroon #800000 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.076
- Wine Red #7B0323 ΔE 0.077
Use #66301E 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.