#A66D28
Closest named color: Leather (#AC7434). oklch(58.3% 0.11 67.2), rgb(166, 109, 40).
Aa
Black text reads best on this color (4.83:1).
About this color
#A66D28 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.110 and its hue 67°. Its hue sits on the warm side of the wheel. The nearest named color is Leather (#AC7434), ΔE 0.022 away. Black text reads best on it, at 4.83:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.110) |
| Temperature | warm |
| Nearest name | Leather (#AC7434) |
| Black text | 4.83:1 |
| White text | 4.33:1 |
Values
| HEX | #A66D28 |
| RGB | rgb(166, 109, 40) |
| HSL | hsl(33, 61%, 40%) |
| OKLCH | oklch(58.3% 0.11 67.2) |
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 #A66D28 | 4.33:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #A66D28 | 4.83:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #A66D28 text on white | 4.33:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #A66D28 text on black | 4.83:1 | AA | Lc -31.9 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F9F5F1
oklch(97.2% 0.007 67.7)
-
Step 100
100
#F1E8E0
oklch(93.6% 0.015 64.3)
-
Step 200
200
#E6D6C6
oklch(88.5% 0.028 67.5)
-
Step 300
300
#D7BB9F
oklch(80.9% 0.05 67)
-
Step 400
400
#C2976B
oklch(70.6% 0.079 66.6)
-
Step 500
500
#B27D41
oklch(63.1% 0.101 67.5)
-
Step 600
600 (this color)
#A66D28
oklch(58.3% 0.11 67.2)
-
Step 700
700
#87540F
oklch(49.3% 0.102 67.4)
-
Step 800
800
#6D4511
oklch(42.7% 0.084 68)
-
Step 900
900
#593A17
oklch(37.7% 0.066 66.5)
-
Step 950
950
#34220F
oklch(27% 0.041 66)
#A66D28 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) | #80711F | 0.068 |
| Deuteranopia (no green cones) | #8D7F29 | 0.061 |
| Tritanopia (no blue cones) | #B55F5F | 0.087 |
| Achromatopsia (no color) | #797979 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66D28
#A66D28
oklch(58.3% 0.11 67.2)
- #3F80B9
#3F80B9
oklch(58.3% 0.11 247.5)
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 #A66D28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leather #AC7434 ΔE 0.022
- Caramel #AF6F09 ΔE 0.023
- Umber #B26400 ΔE 0.028
- Clay Brown #B2713D ΔE 0.031
- Orangey Brown #B16002 ΔE 0.034
- Brown Orange #B96902 ΔE 0.035
- Earth #A2653E ΔE 0.035
- Copper #B66325 ΔE 0.035
Use #A66D28 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.