#A66358
Closest named color: Earth (#A2653E). oklch(57.2% 0.089 30.1), rgb(166, 99, 88).
Aa
White text reads best on this color (4.61:1).
About this color
#A66358 is a medium-dark, moderately saturated red. In OKLCH its lightness is 57%, its chroma 0.089 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Earth (#A2653E), ΔE 0.037 away. White text reads best on it, at 4.61:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Earth (#A2653E) |
| Black text | 4.54:1 |
| White text | 4.61:1 |
Values
| HEX | #A66358 |
| RGB | rgb(166, 99, 88) |
| HSL | hsl(8, 31%, 50%) |
| OKLCH | oklch(57.2% 0.089 30.1) |
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 #A66358 | 4.61:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #A66358 | 4.54:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #A66358 text on white | 4.61:1 | AA | Lc 71.9 | Content text, not long reading |
| #A66358 text on black | 4.54:1 | AA | Lc -29.8 | 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
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F2E7E5
oklch(93.6% 0.012 29.9)
-
Step 200
200
#E8D4D0
oklch(88.5% 0.023 31.1)
-
Step 300
300
#D9B8B1
oklch(80.9% 0.039 32)
-
Step 400
400
#C69289
oklch(70.7% 0.065 29.9)
-
Step 500
500
#B6766C
oklch(63% 0.083 29.3)
-
Step 600
600 (this color)
#A66358
oklch(57.2% 0.089 30.1)
-
Step 700
700
#8A4E44
oklch(49.2% 0.083 30.4)
-
Step 800
800
#704038
oklch(42.7% 0.069 30.3)
-
Step 900
900
#5B3630
oklch(37.6% 0.055 29.8)
-
Step 950
950
#35201C
oklch(26.9% 0.034 31.2)
#A66358 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) | #726D57 | 0.091 |
| Deuteranopia (no green cones) | #837A57 | 0.083 |
| Tritanopia (no blue cones) | #B35960 | 0.037 |
| Achromatopsia (no color) | #757575 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66358
#A66358
oklch(57.2% 0.089 30.1)
- #238695
#238695
oklch(57.2% 0.089 210)
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 #A66358, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Earth #A2653E ΔE 0.037
- Clay #B66A50 ΔE 0.039
- Pinkish Brown #B17261 ΔE 0.044
- Reddish Grey #997570 ΔE 0.050
- Dusky Rose #BA6873 ΔE 0.054
- Mocha #9D7651 ΔE 0.056
- Adobe #BD6C48 ΔE 0.056
- Sienna #A0522D ΔE 0.058
Use #A66358 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.