#A66A36
Closest named color: Earth (#A2653E). oklch(57.9% 0.102 59.5), rgb(166, 106, 54).
Aa
Black text reads best on this color (4.73:1).
About this color
#A66A36 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.102 and its hue 59°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.019 away. Black text reads best on it, at 4.73:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.102) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #A66A36 |
| RGB | rgb(166, 106, 54) |
| HSL | hsl(28, 51%, 43%) |
| OKLCH | oklch(57.9% 0.102 59.5) |
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 #A66A36 | 4.43:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #A66A36 | 4.73:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #A66A36 text on white | 4.43:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #A66A36 text on black | 4.73:1 | AA | Lc -31.1 | 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
#F9F4F1
oklch(97% 0.007 53.4)
-
Step 100
100
#F1E8E1
oklch(93.6% 0.014 60.6)
-
Step 200
200
#E6D6C9
oklch(88.6% 0.025 61.6)
-
Step 300
300
#D8BAA4
oklch(80.9% 0.046 58.3)
-
Step 400
400
#C39672
oklch(70.7% 0.073 59.9)
-
Step 500
500
#B47B4D
oklch(63.1% 0.094 58.8)
-
Step 600
600 (this color)
#A66A36
oklch(57.9% 0.102 59.5)
-
Step 700
700
#885221
oklch(49.1% 0.096 59.5)
-
Step 800
800
#6E431E
oklch(42.6% 0.078 58.9)
-
Step 900
900
#59391E
oklch(37.6% 0.061 59.5)
-
Step 950
950
#342212
oklch(27% 0.038 61.7)
#A66A36 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) | #7C7031 | 0.074 |
| Deuteranopia (no green cones) | #8A7D36 | 0.067 |
| Tritanopia (no blue cones) | #B55D5E | 0.073 |
| Achromatopsia (no color) | #787878 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66A36
#A66A36
oklch(57.9% 0.102 59.5)
- #3781B0
#3781B0
oklch(57.8% 0.103 239.9)
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 #A66A36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.019
- Clay Brown #B2713D ΔE 0.030
- Leather #AC7434 ΔE 0.030
- Copper #B66325 ΔE 0.031
- Umber #B26400 ΔE 0.033
- Orangey Brown #B16002 ΔE 0.034
- Raw Umber #A75E09 ΔE 0.034
- Mocha #9D7651 ΔE 0.036
Use #A66A36 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.