#A3531A
Closest named color: Sienna (#A0522D). oklch(53.1% 0.125 51.1), rgb(163, 83, 26).
Aa
White text reads best on this color (5.51:1).
About this color
#A3531A is a medium-dark, moderately saturated brown. In OKLCH its lightness is 53%, its chroma 0.125 and its hue 51°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.017 away. White text reads best on it, at 5.51:1.
| Hue family | Browns |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.125) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.80:1 |
| White text | 5.51:1 |
Values
| HEX | #A3531A |
| RGB | rgb(163, 83, 26) |
| HSL | hsl(25, 72%, 37%) |
| OKLCH | oklch(53.1% 0.125 51.1) |
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 #A3531A | 5.51:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #A3531A | 3.80:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #A3531A text on white | 5.51:1 | AA | Lc 77.0 | Fine for body text |
| #A3531A text on black | 3.80:1 | AA large text | Lc -24.7 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E0
oklch(93.6% 0.016 52.6)
-
Step 200
200
#EBD4C7
oklch(88.5% 0.031 51.5)
-
Step 300
300
#DFB7A0
oklch(80.9% 0.056 51.5)
-
Step 400
400
#CE906C
oklch(70.6% 0.09 50.9)
-
Step 500
500
#C07444
oklch(63.2% 0.115 51.6)
-
Step 600
600 (this color)
#A3531A
oklch(53.1% 0.125 51.1)
-
Step 700
700
#934A16
oklch(49.2% 0.116 51)
-
Step 800
800
#773D15
oklch(42.6% 0.096 51.3)
-
Step 900
900
#603519
oklch(37.7% 0.074 51.7)
-
Step 950
950
#391F10
oklch(27% 0.048 49.7)
#A3531A 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) | #6A5E10 | 0.108 |
| Deuteranopia (no green cones) | #7D7018 | 0.098 |
| Tritanopia (no blue cones) | #B34148 | 0.076 |
| Achromatopsia (no color) | #696969 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3531A
#A3531A
oklch(53.1% 0.125 51.1)
- #00769E
#00769E
oklch(53.1% 0.107 230.8)
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 #A3531A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.017
- Cinnamon #AC4F06 ΔE 0.018
- Sepia #985E2B ΔE 0.030
- Warm Brown #964E02 ΔE 0.031
- Raw Umber #A75E09 ΔE 0.032
- Burnt Umber #A0450E ΔE 0.032
- Burnt Siena #B75203 ΔE 0.038
- Raw Sienna #9A6200 ΔE 0.044
Use #A3531A 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.