#A66E39
Closest named color: Leather (#AC7434). oklch(58.7% 0.099 62.2), rgb(166, 110, 57).
Aa
Black text reads best on this color (4.91:1).
About this color
#A66E39 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.099 and its hue 62°. Its hue sits on the warm side of the wheel. The nearest named color is Leather (#AC7434), ΔE 0.021 away. Black text reads best on it, at 4.91:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.099) |
| Temperature | warm |
| Nearest name | Leather (#AC7434) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #A66E39 |
| RGB | rgb(166, 110, 57) |
| HSL | hsl(29, 49%, 44%) |
| OKLCH | oklch(58.7% 0.099 62.2) |
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 #A66E39 | 4.27:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #A66E39 | 4.91:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #A66E39 text on white | 4.27:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #A66E39 text on black | 4.91:1 | AA | Lc -32.3 | 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
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#F0E8E1
oklch(93.5% 0.013 63.9)
-
Step 200
200
#E6D6C9
oklch(88.6% 0.025 61.6)
-
Step 300
300
#D6BBA4
oklch(80.9% 0.044 62.6)
-
Step 400
400
#C19772
oklch(70.7% 0.072 62.6)
-
Step 500
500
#B17D4D
oklch(63.2% 0.091 62.7)
-
Step 600
600 (this color)
#A66E39
oklch(58.7% 0.099 62.2)
-
Step 700
700
#855422
oklch(49.1% 0.092 63)
-
Step 800
800
#6C451E
oklch(42.7% 0.076 63.1)
-
Step 900
900
#583A1E
oklch(37.7% 0.06 62.4)
-
Step 950
950
#342212
oklch(27% 0.038 61.7)
#A66E39 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) | #7F7334 | 0.068 |
| Deuteranopia (no green cones) | #8D7F3A | 0.059 |
| Tritanopia (no blue cones) | #B56262 | 0.074 |
| Achromatopsia (no color) | #7A7A7A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66E39
#A66E39
oklch(58.7% 0.099 62.2)
- #4183B2
#4183B2
oklch(58.7% 0.099 242.1)
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 #A66E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leather #AC7434 ΔE 0.021
- Clay Brown #B2713D ΔE 0.024
- Earth #A2653E ΔE 0.027
- Mocha #9D7651 ΔE 0.029
- Caramel #AF6F09 ΔE 0.033
- Copper #B66325 ΔE 0.035
- Umber #B26400 ΔE 0.036
- Tiger's Eye #BC6C25 ΔE 0.040
Use #A66E39 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.