#A66C33
Closest named color: Leather (#AC7434). oklch(58.2% 0.104 62.7), rgb(166, 108, 51).
Aa
Black text reads best on this color (4.81:1).
About this color
#A66C33 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.104 and its hue 63°. Its hue sits on the warm side of the wheel. The nearest named color is Leather (#AC7434), ΔE 0.024 away. Black text reads best on it, at 4.81:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.104) |
| Temperature | warm |
| Nearest name | Leather (#AC7434) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #A66C33 |
| RGB | rgb(166, 108, 51) |
| HSL | hsl(30, 53%, 43%) |
| OKLCH | oklch(58.2% 0.104 62.7) |
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 #A66C33 | 4.36:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #A66C33 | 4.81:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #A66C33 text on white | 4.36:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #A66C33 text on black | 4.81:1 | AA | Lc -31.7 | 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
#F1E8E1
oklch(93.6% 0.014 60.6)
-
Step 200
200
#E6D6C8
oklch(88.5% 0.026 63.7)
-
Step 300
300
#D7BBA2
oklch(81% 0.047 63.9)
-
Step 400
400
#C29770
oklch(70.7% 0.074 63.4)
-
Step 500
500
#B27C49
oklch(63% 0.095 63)
-
Step 600
600 (this color)
#A66C33
oklch(58.2% 0.104 62.7)
-
Step 700
700
#87531D
oklch(49.2% 0.097 62.6)
-
Step 800
800
#6D441A
oklch(42.6% 0.08 63.1)
-
Step 900
900
#593A1C
oklch(37.8% 0.062 63)
-
Step 950
950
#342211
oklch(27% 0.039 63.2)
#A66C33 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) | #7E712D | 0.071 |
| Deuteranopia (no green cones) | #8C7E34 | 0.063 |
| Tritanopia (no blue cones) | #B55F5F | 0.077 |
| Achromatopsia (no color) | #797979 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66C33
#A66C33
oklch(58.2% 0.104 62.7)
- #3C81B3
#3C81B3
oklch(58.1% 0.104 242.9)
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 #A66C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leather #AC7434 ΔE 0.024
- Earth #A2653E ΔE 0.026
- Clay Brown #B2713D ΔE 0.027
- Caramel #AF6F09 ΔE 0.031
- Umber #B26400 ΔE 0.031
- Copper #B66325 ΔE 0.032
- Orangey Brown #B16002 ΔE 0.035
- Mocha #9D7651 ΔE 0.035
Use #A66C33 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.