#66321D
Closest named color: Chestnut (#742802). oklch(38.1% 0.082 42), rgb(102, 50, 29).
Aa
White text reads best on this color (10.29:1).
About this color
#66321D is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.082 and its hue 42°. 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 10.29:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.082) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #66321D |
| RGB | rgb(102, 50, 29) |
| HSL | hsl(17, 56%, 26%) |
| OKLCH | oklch(38.1% 0.082 42) |
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 #66321D | 10.29:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #66321D | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #66321D text on white | 10.29:1 | AAA | Lc 93.5 | Preferred for body text |
| #66321D text on black | 2.03:1 | Fails | Lc -9.0 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EED2C8
oklch(88.4% 0.034 40.7)
-
Step 300
300
#E4B4A2
oklch(80.8% 0.061 41.5)
-
Step 400
400
#D58C70
oklch(70.8% 0.098 41.7)
-
Step 500
500
#C86D49
oklch(63.1% 0.126 41.8)
-
Step 600
600
#B3532B
oklch(55.6% 0.136 41.8)
-
Step 700
700
#9A431D
oklch(49.2% 0.127 42)
-
Step 800
800
#7D381B
oklch(42.8% 0.105 41.9)
-
Step 900
900 (this color)
#66321D
oklch(38.1% 0.082 42)
-
Step 950
950
#3B1D11
oklch(26.9% 0.052 42.1)
#66321D 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) | #40391B | 0.076 |
| Deuteranopia (no green cones) | #4D451C | 0.070 |
| Tritanopia (no blue cones) | #70282D | 0.042 |
| Achromatopsia (no color) | #404040 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66321D
#66321D
oklch(38.1% 0.082 42)
- #004B5D
#004B5D
oklch(38.2% 0.07 220.9)
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 #66321D, 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 0.061
- Mud Brown #60460F ΔE 0.062
- Blood #770001 ΔE 0.073
- Red Brown #8B2E16 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.077
- Maroon #800000 ΔE 0.077
Use #66321D 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.