#A66A55
Closest named color: Clay (#B66A50). oklch(58.4% 0.084 40), rgb(166, 106, 85).
Aa
Black text reads best on this color (4.81:1).
About this color
#A66A55 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.084 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Clay (#B66A50), ΔE 0.029 away. Black text reads best on it, at 4.81:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.084) |
| Temperature | warm |
| Nearest name | Clay (#B66A50) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #A66A55 |
| RGB | rgb(166, 106, 85) |
| HSL | hsl(16, 32%, 49%) |
| OKLCH | oklch(58.4% 0.084 40) |
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 #A66A55 | 4.36:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #A66A55 | 4.81:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #A66A55 text on white | 4.36:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #A66A55 text on black | 4.81:1 | AA | Lc -31.6 | 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
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F1E8E4
oklch(93.7% 0.011 45.7)
-
Step 200
200
#E6D5CF
oklch(88.5% 0.021 40.5)
-
Step 300
300
#D7B9AF
oklch(80.9% 0.037 39.3)
-
Step 400
400
#C29484
oklch(70.6% 0.06 40)
-
Step 500
500
#B27A66
oklch(63.2% 0.077 40.5)
-
Step 600
600 (this color)
#A66A55
oklch(58.4% 0.084 40)
-
Step 700
700
#86513E
oklch(49.1% 0.077 40.4)
-
Step 800
800
#6D4233
oklch(42.6% 0.065 40)
-
Step 900
900
#59382D
oklch(37.7% 0.051 39.2)
-
Step 950
950
#34211B
oklch(27% 0.032 38.3)
#A66A55 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) | #797153 | 0.077 |
| Deuteranopia (no green cones) | #877E54 | 0.072 |
| Tritanopia (no blue cones) | #B36065 | 0.045 |
| Achromatopsia (no color) | #797979 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66A55
#A66A55
oklch(58.4% 0.084 40)
- #38879E
#38879E
oklch(58.4% 0.084 220.2)
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 #A66A55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clay #B66A50 ΔE 0.029
- Earth #A2653E ΔE 0.029
- Pinkish Brown #B17261 ΔE 0.031
- Mocha #9D7651 ΔE 0.037
- Reddish Grey #997570 ΔE 0.042
- Clay Brown #B2713D ΔE 0.044
- Adobe #BD6C48 ΔE 0.045
- Copper #B66325 ΔE 0.052
Use #A66A55 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.