#A66D3D
Closest named color: Earth (#A2653E). oklch(58.5% 0.097 59.3), rgb(166, 109, 61).
Aa
Black text reads best on this color (4.87:1).
About this color
#A66D3D is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.097 and its hue 59°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.023 away. Black text reads best on it, at 4.87:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.097) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #A66D3D |
| RGB | rgb(166, 109, 61) |
| HSL | hsl(27, 46%, 45%) |
| OKLCH | oklch(58.5% 0.097 59.3) |
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 #A66D3D | 4.30:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #A66D3D | 4.87:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #A66D3D text on white | 4.30:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #A66D3D text on black | 4.87:1 | AA | Lc -32.1 | 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
#F9F5F2
oklch(97.2% 0.006 59.7)
-
Step 100
100
#F1E8E2
oklch(93.6% 0.013 56.2)
-
Step 200
200
#E6D6CA
oklch(88.6% 0.024 59.4)
-
Step 300
300
#D7BBA5
oklch(81% 0.044 60.3)
-
Step 400
400
#C29775
oklch(70.8% 0.07 59.7)
-
Step 500
500
#B17C51
oklch(63% 0.088 59.3)
-
Step 600
600 (this color)
#A66D3D
oklch(58.5% 0.097 59.3)
-
Step 700
700
#865327
oklch(49.1% 0.09 59)
-
Step 800
800
#6D4421
oklch(42.7% 0.075 59.1)
-
Step 900
900
#583A20
oklch(37.7% 0.058 60.6)
-
Step 950
950
#342214
oklch(27% 0.037 58.3)
#A66D3D 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) | #7E7239 | 0.070 |
| Deuteranopia (no green cones) | #8C7F3D | 0.063 |
| Tritanopia (no blue cones) | #B46162 | 0.069 |
| Achromatopsia (no color) | #7A7A7A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66D3D
#A66D3D
oklch(58.5% 0.097 59.3)
- #3E83AF
#3E83AF
oklch(58.5% 0.097 239.4)
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 #A66D3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.023
- Clay Brown #B2713D ΔE 0.025
- Leather #AC7434 ΔE 0.026
- Mocha #9D7651 ΔE 0.028
- Copper #B66325 ΔE 0.035
- Caramel #AF6F09 ΔE 0.038
- Umber #B26400 ΔE 0.039
- Clay #B66A50 ΔE 0.040
Use #A66D3D 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.