#B4581B
Closest named color: Burnt Siena (#B75203). oklch(56.4% 0.138 49), rgb(180, 88, 27).
Aa
White text reads best on this color (4.82:1).
About this color
#B4581B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 56%, its chroma 0.138 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.013 away. White text reads best on it, at 4.82:1.
| Hue family | Browns |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.138) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.35:1 |
| White text | 4.82:1 |
Values
| HEX | #B4581B |
| RGB | rgb(180, 88, 27) |
| HSL | hsl(24, 74%, 41%) |
| OKLCH | oklch(56.4% 0.138 49) |
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 #B4581B | 4.82:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #B4581B | 4.35:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #B4581B text on white | 4.82:1 | AA | Lc 72.9 | Content text, not long reading |
| #B4581B text on black | 4.35:1 | AA large text | Lc -28.8 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F5E7E0
oklch(93.7% 0.018 48.5)
-
Step 200
200
#EDD3C6
oklch(88.5% 0.034 48.3)
-
Step 300
300
#E3B59E
oklch(80.8% 0.062 47.9)
-
Step 400
400
#D38E68
oklch(70.8% 0.099 49.4)
-
Step 500
500
#C66F3D
oklch(63% 0.128 48.8)
-
Step 600
600 (this color)
#B4581B
oklch(56.4% 0.138 49)
-
Step 700
700
#984507
oklch(49% 0.128 48.9)
-
Step 800
800
#7C3A0D
oklch(42.8% 0.106 49.2)
-
Step 900
900
#643214
oklch(37.7% 0.083 48.8)
-
Step 950
950
#3B1E0D
oklch(27.1% 0.053 49.4)
#B4581B 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) | #736510 | 0.121 |
| Deuteranopia (no green cones) | #897A18 | 0.111 |
| Tritanopia (no blue cones) | #C6434C | 0.081 |
| Achromatopsia (no color) | #727272 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4581B
#B4581B
oklch(56.4% 0.138 49)
- #0081A9
#0081A9
oklch(56.4% 0.111 228.8)
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 #B4581B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.013
- Orangey Brown #B16002 ΔE 0.024
- Copper #B66325 ΔE 0.025
- Burnt Orange #C04E01 ΔE 0.027
- Cinnamon #AC4F06 ΔE 0.027
- Rust Orange #C45508 ΔE 0.030
- Raw Umber #A75E09 ΔE 0.030
- Umber #B26400 ΔE 0.033
Use #B4581B 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.