#66381E
Closest named color: Chestnut (#742802). oklch(39.3% 0.076 48.7), rgb(102, 56, 30).
Aa
White text reads best on this color (9.77:1).
About this color
#66381E is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.076 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.042 away. White text reads best on it, at 9.77:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #66381E |
| RGB | rgb(102, 56, 30) |
| HSL | hsl(22, 55%, 26%) |
| OKLCH | oklch(39.3% 0.076 48.7) |
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 #66381E | 9.77:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #66381E | 2.14:1 | Fails | Lc 11.6 | Not readable |
| #66381E text on white | 9.77:1 | AAA | Lc 92.4 | Preferred for body text |
| #66381E 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E7E0
oklch(93.6% 0.017 50.4)
-
Step 200
200
#ECD4C7
oklch(88.6% 0.032 50.4)
-
Step 300
300
#E0B6A1
oklch(80.8% 0.057 48)
-
Step 400
400
#CF8F6D
oklch(70.6% 0.091 48.8)
-
Step 500
500
#C27246
oklch(63.1% 0.117 48.4)
-
Step 600
600
#AD5926
oklch(55.6% 0.127 48.7)
-
Step 700
700
#944818
oklch(49% 0.118 48.6)
-
Step 800
800
#783C17
oklch(42.6% 0.097 49)
-
Step 900
900 (this color)
#66381E
oklch(39.3% 0.076 48.7)
-
Step 950
950
#391F10
oklch(27% 0.048 49.7)
#66381E 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) | #453E1B | 0.065 |
| Deuteranopia (no green cones) | #50481E | 0.060 |
| Tritanopia (no blue cones) | #702F32 | 0.046 |
| Achromatopsia (no color) | #444444 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66381E
#66381E
oklch(39.3% 0.076 48.7)
- #034D66
#034D66
oklch(39.3% 0.076 228.7)
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 #66381E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.042
- Purple Brown #673A3F ΔE 0.046
- Mud Brown #60460F ΔE 0.047
- Rust Brown #8B3103 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.074
- Reddy Brown #6E1005 ΔE 0.075
- Brownish Purple #76424E ΔE 0.076
- Green Brown #544E03 ΔE 0.080
Use #66381E 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.