#A66037
Closest named color: Earth (#A2653E). oklch(56% 0.107 49.6), rgb(166, 96, 55).
Aa
White text reads best on this color (4.82:1).
About this color
#A66037 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 56%, its chroma 0.107 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.013 away. White text reads best on it, at 4.82:1.
| Hue family | Browns |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.107) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.34:1 |
| White text | 4.82:1 |
Values
| HEX | #A66037 |
| RGB | rgb(166, 96, 55) |
| HSL | hsl(22, 50%, 43%) |
| OKLCH | oklch(56% 0.107 49.6) |
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 #A66037 | 4.82:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #A66037 | 4.34:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #A66037 text on white | 4.82:1 | AA | Lc 73.2 | Content text, not long reading |
| #A66037 text on black | 4.34:1 | AA large text | Lc -28.5 | Dividers and decoration only |
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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F2E7E2
oklch(93.5% 0.014 46.2)
-
Step 200
200
#E9D4CA
oklch(88.4% 0.027 47.2)
-
Step 300
300
#DBB8A6
oklch(80.8% 0.048 48.8)
-
Step 400
400
#C89376
oklch(70.7% 0.076 49.8)
-
Step 500
500
#B97752
oklch(63.1% 0.098 49.6)
-
Step 600
600 (this color)
#A66037
oklch(56% 0.107 49.6)
-
Step 700
700
#8D4E28
oklch(49.2% 0.099 49.8)
-
Step 800
800
#724022
oklch(42.6% 0.082 50.1)
-
Step 900
900
#5D3721
oklch(37.8% 0.064 49.9)
-
Step 950
950
#362014
oklch(26.9% 0.04 49)
#A66037 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) | #746833 | 0.090 |
| Deuteranopia (no green cones) | #847836 | 0.084 |
| Tritanopia (no blue cones) | #B55257 | 0.066 |
| Achromatopsia (no color) | #727272 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66037
#A66037
oklch(56% 0.107 49.6)
- #137FA7
#137FA7
oklch(56% 0.107 230.2)
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 #A66037, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.013
- Raw Umber #A75E09 ΔE 0.030
- Sepia #985E2B ΔE 0.030
- Copper #B66325 ΔE 0.035
- Orangey Brown #B16002 ΔE 0.036
- Sienna #A0522D ΔE 0.036
- Cinnamon #AC4F06 ΔE 0.042
- Umber #B26400 ΔE 0.042
Use #A66037 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.