#A66A45
Closest named color: Earth (#A2653E). oklch(58.1% 0.093 51.7), rgb(166, 106, 69).
Aa
Black text reads best on this color (4.76:1).
About this color
#A66A45 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.093 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.016 away. Black text reads best on it, at 4.76:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #A66A45 |
| RGB | rgb(166, 106, 69) |
| HSL | hsl(23, 41%, 46%) |
| OKLCH | oklch(58.1% 0.093 51.7) |
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 #A66A45 | 4.40:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #A66A45 | 4.76:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #A66A45 text on white | 4.40:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #A66A45 text on black | 4.76:1 | AA | Lc -31.3 | 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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F1E8E3
oklch(93.7% 0.012 51.3)
-
Step 200
200
#E6D5CC
oklch(88.4% 0.023 49.9)
-
Step 300
300
#D8BAA9
oklch(81% 0.042 51.4)
-
Step 400
400
#C3957A
oklch(70.6% 0.067 51.7)
-
Step 500
500
#B37A59
oklch(63% 0.085 50.7)
-
Step 600
600 (this color)
#A66A45
oklch(58.1% 0.093 51.7)
-
Step 700
700
#875230
oklch(49.2% 0.086 52.2)
-
Step 800
800
#6E4328
oklch(42.7% 0.072 51.9)
-
Step 900
900
#593925
oklch(37.7% 0.055 52.3)
-
Step 950
950
#342116
oklch(26.9% 0.035 50.8)
#A66A45 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) | #7B7042 | 0.075 |
| Deuteranopia (no green cones) | #897D45 | 0.068 |
| Tritanopia (no blue cones) | #B45E61 | 0.060 |
| Achromatopsia (no color) | #787878 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66A45
#A66A45
oklch(58.1% 0.093 51.7)
- #3784A8
#3784A8
oklch(58.1% 0.093 231.8)
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 #A66A45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.016
- Mocha #9D7651 ΔE 0.032
- Clay Brown #B2713D ΔE 0.032
- Clay #B66A50 ΔE 0.033
- Copper #B66325 ΔE 0.037
- Leather #AC7434 ΔE 0.038
- Pinkish Brown #B17261 ΔE 0.042
- Adobe #BD6C48 ΔE 0.043
Use #A66A45 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.