#66381A
Closest named color: Chestnut (#742802). oklch(39.2% 0.078 51.6), rgb(102, 56, 26).
Aa
White text reads best on this color (9.78:1).
About this color
#66381A is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.078 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.041 away. White text reads best on it, at 9.78:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #66381A |
| RGB | rgb(102, 56, 26) |
| HSL | hsl(24, 59%, 25%) |
| OKLCH | oklch(39.2% 0.078 51.6) |
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 #66381A | 9.78:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #66381A | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #66381A text on white | 9.78:1 | AAA | Lc 92.4 | Preferred for body text |
| #66381A 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
#ECD4C6
oklch(88.6% 0.033 52.3)
-
Step 300
300
#E0B79F
oklch(81% 0.058 52)
-
Step 400
400
#D09069
oklch(70.8% 0.094 52)
-
Step 500
500
#C27240
oklch(63% 0.12 51)
-
Step 600
600
#AD591C
oklch(55.5% 0.13 51.5)
-
Step 700
700
#95490C
oklch(49.2% 0.121 51.8)
-
Step 800
800
#793C10
oklch(42.7% 0.101 51.3)
-
Step 900
900 (this color)
#66381A
oklch(39.2% 0.078 51.6)
-
Step 950
950
#391F0E
oklch(27% 0.049 52.4)
#66381A 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) | #453D17 | 0.065 |
| Deuteranopia (no green cones) | #50481A | 0.060 |
| Tritanopia (no blue cones) | #702F31 | 0.048 |
| Achromatopsia (no color) | #444444 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66381A
#66381A
oklch(39.2% 0.078 51.6)
- #034C68
#034C68
oklch(39.1% 0.079 232)
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 #66381A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.041
- Mud Brown #60460F ΔE 0.045
- Purple Brown #673A3F ΔE 0.050
- Rust Brown #8B3103 ΔE 0.074
- Red Brown #8B2E16 ΔE 0.075
- Reddy Brown #6E1005 ΔE 0.076
- Green Brown #544E03 ΔE 0.078
- Brownish Purple #76424E ΔE 0.080
Use #66381A 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.