#A66D55
Closest named color: Pinkish Brown (#B17261). oklch(58.9% 0.081 43.6), rgb(166, 109, 85).
Aa
Black text reads best on this color (4.94:1).
About this color
#A66D55 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.081 and its hue 44°. Its hue sits on the warm side of the wheel. The nearest named color is Pinkish Brown (#B17261), ΔE 0.028 away. Black text reads best on it, at 4.94:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Pinkish Brown (#B17261) |
| Black text | 4.94:1 |
| White text | 4.25:1 |
Values
| HEX | #A66D55 |
| RGB | rgb(166, 109, 85) |
| HSL | hsl(18, 32%, 49%) |
| OKLCH | oklch(58.9% 0.081 43.6) |
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 #A66D55 | 4.25:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #A66D55 | 4.94:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #A66D55 text on white | 4.25:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #A66D55 text on black | 4.94:1 | AA | Lc -32.4 | 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
#F8F4F3
oklch(97% 0.005 34.3)
-
Step 100
100
#F0E8E4
oklch(93.6% 0.01 48.6)
-
Step 200
200
#E6D5CF
oklch(88.5% 0.021 40.5)
-
Step 300
300
#D6BAAE
oklch(81% 0.036 44.6)
-
Step 400
400
#C19583
oklch(70.6% 0.059 43.3)
-
Step 500
500
#B07B64
oklch(63.1% 0.075 44.4)
-
Step 600
600 (this color)
#A66D55
oklch(58.9% 0.081 43.6)
-
Step 700
700
#85523D
oklch(49.1% 0.076 43)
-
Step 800
800
#6C4332
oklch(42.6% 0.063 43.2)
-
Step 900
900
#58392C
oklch(37.7% 0.049 43.5)
-
Step 950
950
#33221A
oklch(27% 0.03 46.2)
#A66D55 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) | #7C7353 | 0.072 |
| Deuteranopia (no green cones) | #897F55 | 0.066 |
| Tritanopia (no blue cones) | #B36367 | 0.047 |
| Achromatopsia (no color) | #7B7B7B | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66D55
#A66D55
oklch(58.9% 0.081 43.6)
- #3F88A1
#3F88A1
oklch(59.1% 0.082 223.3)
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 #A66D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pinkish Brown #B17261 ΔE 0.028
- Clay #B66A50 ΔE 0.028
- Mocha #9D7651 ΔE 0.030
- Earth #A2653E ΔE 0.031
- Clay Brown #B2713D ΔE 0.039
- Reddish Grey #997570 ΔE 0.040
- Adobe #BD6C48 ΔE 0.042
- Puce #A57E52 ΔE 0.047
Use #A66D55 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.