#A0511B
Closest named color: Sienna (#A0522D). oklch(52.3% 0.123 50.4), rgb(160, 81, 27).
Aa
White text reads best on this color (5.69:1).
About this color
#A0511B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 52%, its chroma 0.123 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.015 away. White text reads best on it, at 5.69:1.
| Hue family | Browns |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.123) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #A0511B |
| RGB | rgb(160, 81, 27) |
| HSL | hsl(24, 71%, 37%) |
| OKLCH | oklch(52.3% 0.123 50.4) |
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 #A0511B | 5.69:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #A0511B | 3.68:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #A0511B text on white | 5.69:1 | AA | Lc 78.0 | Fine for body text |
| #A0511B text on black | 3.68:1 | AA large text | Lc -23.8 | 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 700.
-
Step 50
50
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E7E0
oklch(93.6% 0.017 50.4)
-
Step 200
200
#ECD3C6
oklch(88.4% 0.033 49.3)
-
Step 300
300
#E1B69F
oklch(80.9% 0.059 49.6)
-
Step 400
400
#D18F6A
oklch(70.7% 0.095 49.9)
-
Step 500
500
#C37240
oklch(63.2% 0.121 50.7)
-
Step 600
600
#AE581C
oklch(55.5% 0.132 50.5)
-
Step 700
700 (this color)
#A0511B
oklch(52.3% 0.123 50.4)
-
Step 800
800
#7A3B10
oklch(42.7% 0.102 49.9)
-
Step 900
900
#623316
oklch(37.6% 0.079 49.9)
-
Step 950
950
#3A1F0E
oklch(27.2% 0.05 51.4)
#A0511B 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) | #685C12 | 0.106 |
| Deuteranopia (no green cones) | #7B6D19 | 0.095 |
| Tritanopia (no blue cones) | #B04046 | 0.073 |
| Achromatopsia (no color) | #676767 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A0511B
#A0511B
oklch(52.3% 0.123 50.4)
- #00749A
#00749A
oklch(52.3% 0.104 229.9)
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 #A0511B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.015
- Cinnamon #AC4F06 ΔE 0.023
- Warm Brown #964E02 ΔE 0.025
- Burnt Umber #A0450E ΔE 0.026
- Sepia #985E2B ΔE 0.031
- Raw Umber #A75E09 ΔE 0.039
- Burnt Siena #B75203 ΔE 0.045
- Raw Sienna #9A6200 ΔE 0.048
Use #A0511B 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.