#A66633
Closest named color: Earth (#A2653E). oklch(57.1% 0.106 56.9), rgb(166, 102, 51).
Aa
White text reads best on this color (4.59:1).
About this color
#A66633 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 57%, its chroma 0.106 and its hue 57°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.014 away. White text reads best on it, at 4.59:1.
| Hue family | Browns |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.56:1 |
| White text | 4.59:1 |
Values
| HEX | #A66633 |
| RGB | rgb(166, 102, 51) |
| HSL | hsl(27, 53%, 43%) |
| OKLCH | oklch(57.1% 0.106 56.9) |
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 #A66633 | 4.59:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #A66633 | 4.56:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #A66633 text on white | 4.59:1 | AA | Lc 71.7 | Content text, not long reading |
| #A66633 text on black | 4.56:1 | AA | Lc -30.0 | 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
#F9F4F1
oklch(97% 0.007 53.4)
-
Step 100
100
#F1E8E1
oklch(93.6% 0.014 60.6)
-
Step 200
200
#E7D5C9
oklch(88.4% 0.026 56)
-
Step 300
300
#D9BAA3
oklch(81% 0.048 58.6)
-
Step 400
400
#C59572
oklch(70.7% 0.075 57.3)
-
Step 500
500
#B67A4C
oklch(63.2% 0.097 57.3)
-
Step 600
600 (this color)
#A66633
oklch(57.1% 0.106 56.9)
-
Step 700
700
#8A5021
oklch(49% 0.099 56.4)
-
Step 800
800
#70421D
oklch(42.7% 0.082 56.8)
-
Step 900
900
#5B381E
oklch(37.7% 0.063 56)
-
Step 950
950
#352112
oklch(26.9% 0.04 56.9)
#A66633 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) | #796C2E | 0.080 |
| Deuteranopia (no green cones) | #887B33 | 0.073 |
| Tritanopia (no blue cones) | #B5585B | 0.074 |
| Achromatopsia (no color) | #757575 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66633
#A66633
oklch(57.1% 0.106 56.9)
- #2C80AE
#2C80AE
oklch(57.1% 0.106 237.1)
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 #A66633, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.014
- Raw Umber #A75E09 ΔE 0.027
- Copper #B66325 ΔE 0.029
- Orangey Brown #B16002 ΔE 0.030
- Umber #B26400 ΔE 0.032
- Sepia #985E2B ΔE 0.035
- Clay Brown #B2713D ΔE 0.037
- Leather #AC7434 ΔE 0.039
Use #A66633 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.