#66372D
Closest named color: Purple Brown (#673A3F). oklch(39.3% 0.07 33), rgb(102, 55, 45).
Aa
White text reads best on this color (9.77:1).
About this color
#66372D is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.070 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.026 away. White text reads best on it, at 9.77:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.070) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #66372D |
| RGB | rgb(102, 55, 45) |
| HSL | hsl(11, 39%, 29%) |
| OKLCH | oklch(39.3% 0.07 33) |
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 #66372D | 9.77:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #66372D | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #66372D text on white | 9.77:1 | AAA | Lc 92.4 | Preferred for body text |
| #66372D text on black | 2.14:1 | Fails | Lc -10.0 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F4E6E3
oklch(93.5% 0.016 32)
-
Step 200
200
#ECD3CD
oklch(88.6% 0.029 33.7)
-
Step 300
300
#E0B5AB
oklch(80.9% 0.052 33.3)
-
Step 400
400
#CF8E7F
oklch(70.8% 0.083 33.5)
-
Step 500
500
#C1705F
oklch(63.1% 0.107 32.8)
-
Step 600
600
#AC5745
oklch(55.6% 0.115 33.2)
-
Step 700
700
#944737
oklch(49.2% 0.108 33.1)
-
Step 800
800
#783A2E
oklch(42.6% 0.09 32.3)
-
Step 900
900 (this color)
#66372D
oklch(39.3% 0.07 33)
-
Step 950
950
#391E18
oklch(27% 0.044 33.4)
#66372D 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) | #423E2C | 0.070 |
| Deuteranopia (no green cones) | #4E482C | 0.065 |
| Tritanopia (no blue cones) | #6F3035 | 0.030 |
| Achromatopsia (no color) | #444444 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66372D
#66372D
oklch(39.3% 0.07 33)
- #004F5C
#004F5C
oklch(39.3% 0.069 213.5)
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 #66372D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.026
- Chestnut #742802 ΔE 0.048
- Brownish Purple #76424E ΔE 0.062
- Mud Brown #60460F ΔE 0.063
- Reddy Brown #6E1005 ΔE 0.075
- Red Brown #8B2E16 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.080
Use #66372D 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.