#B0523B
Closest named color: Sienna (#A0522D). oklch(55.2% 0.128 34.9), rgb(176, 82, 59).
Aa
White text reads best on this color (5.10:1).
About this color
#B0523B is a medium-dark, moderately saturated red. In OKLCH its lightness is 55%, its chroma 0.128 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.035 away. White text reads best on it, at 5.10:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.128) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #B0523B |
| RGB | rgb(176, 82, 59) |
| HSL | hsl(12, 50%, 46%) |
| OKLCH | oklch(55.2% 0.128 34.9) |
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 #B0523B | 5.10:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #B0523B | 4.11:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #B0523B text on white | 5.10:1 | AA | Lc 74.7 | Content text, not long reading |
| #B0523B text on black | 4.11:1 | AA large text | Lc -27.0 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EDD2CB
oklch(88.4% 0.032 34.9)
-
Step 300
300
#E3B4A8
oklch(80.9% 0.058 34.7)
-
Step 400
400
#D38C79
oklch(70.7% 0.092 35.7)
-
Step 500
500
#C66D57
oklch(63.1% 0.118 34.9)
-
Step 600
600 (this color)
#B0523B
oklch(55.2% 0.128 34.9)
-
Step 700
700
#98432E
oklch(49% 0.119 35.1)
-
Step 800
800
#7C3827
oklch(42.8% 0.099 35.2)
-
Step 900
900
#643124
oklch(37.7% 0.077 35.3)
-
Step 950
950
#3B1D16
oklch(27% 0.049 34.1)
#B0523B 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) | #6B6139 | 0.127 |
| Deuteranopia (no green cones) | #827639 | 0.118 |
| Tritanopia (no blue cones) | #C1404D | 0.055 |
| Achromatopsia (no color) | #6E6E6E | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0523B
#B0523B
oklch(55.2% 0.128 34.9)
- #008096
#008096
oklch(55.2% 0.098 215.3)
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 #B0523B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.035
- Cinnamon #AC4F06 ΔE 0.039
- Burnt Siena #B75203 ΔE 0.039
- Dusty Red #B9484E ΔE 0.040
- Dull Red #BB3F3F ΔE 0.042
- Brick Orange #C14A09 ΔE 0.043
- Burnt Orange #C04E01 ΔE 0.044
- Sinopia #BB3E03 ΔE 0.046
Use #B0523B 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.