#A66E57
Closest named color: Pinkish Brown (#B17261). oklch(59.2% 0.079 43.1), rgb(166, 110, 87).
Aa
Black text reads best on this color (4.98:1).
About this color
#A66E57 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.079 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Pinkish Brown (#B17261), ΔE 0.026 away. Black text reads best on it, at 4.98:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Pinkish Brown (#B17261) |
| Black text | 4.98:1 |
| White text | 4.20:1 |
Values
| HEX | #A66E57 |
| RGB | rgb(166, 110, 87) |
| HSL | hsl(17, 31%, 50%) |
| OKLCH | oklch(59.2% 0.079 43.1) |
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 #A66E57 | 4.20:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #A66E57 | 4.98:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #A66E57 text on white | 4.20:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #A66E57 text on black | 4.98:1 | AA | Lc -32.8 | 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
#F8F4F3
oklch(97% 0.005 34.3)
-
Step 100
100
#F0E8E4
oklch(93.6% 0.01 48.6)
-
Step 200
200
#E5D5CF
oklch(88.4% 0.02 41.8)
-
Step 300
300
#D6BAAF
oklch(81% 0.036 42.7)
-
Step 400
400
#C09684
oklch(70.8% 0.057 44.3)
-
Step 500
500
#B07B66
oklch(63.1% 0.073 42.5)
-
Step 600
600 (this color)
#A66E57
oklch(59.2% 0.079 43.1)
-
Step 700
700
#84523E
oklch(49% 0.074 42.5)
-
Step 800
800
#6B4433
oklch(42.7% 0.061 44.3)
-
Step 900
900
#57392D
oklch(37.6% 0.047 42.6)
-
Step 950
950
#33221A
oklch(27% 0.03 46.2)
#A66E57 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) | #7C7455 | 0.071 |
| Deuteranopia (no green cones) | #8A8057 | 0.065 |
| Tritanopia (no blue cones) | #B36568 | 0.044 |
| Achromatopsia (no color) | #7B7B7B | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66E57
#A66E57
oklch(59.2% 0.079 43.1)
- #4288A0
#4288A0
oklch(59.1% 0.079 223.1)
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 #A66E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pinkish Brown #B17261 ΔE 0.026
- Clay #B66A50 ΔE 0.029
- Mocha #9D7651 ΔE 0.029
- Earth #A2653E ΔE 0.034
- Reddish Grey #997570 ΔE 0.037
- Clay Brown #B2713D ΔE 0.039
- Adobe #BD6C48 ΔE 0.042
- Puce #A57E52 ΔE 0.046
Use #A66E57 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.