#B15721
Closest named color: Burnt Siena (#B75203). oklch(55.8% 0.134 47.8), rgb(177, 87, 33).
Aa
White text reads best on this color (4.93:1).
About this color
#B15721 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 56%, its chroma 0.134 and its hue 48°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.016 away. White text reads best on it, at 4.93:1.
| Hue family | Browns |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.134) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #B15721 |
| RGB | rgb(177, 87, 33) |
| HSL | hsl(23, 69%, 41%) |
| OKLCH | oklch(55.8% 0.134 47.8) |
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 #B15721 | 4.93:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #B15721 | 4.25:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #B15721 text on white | 4.93:1 | AA | Lc 73.6 | Content text, not long reading |
| #B15721 text on black | 4.25:1 | AA large text | Lc -28.1 | 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
#F4E7E0
oklch(93.6% 0.017 50.4)
-
Step 200
200
#EDD3C7
oklch(88.5% 0.033 46.4)
-
Step 300
300
#E2B69F
oklch(81% 0.06 49)
-
Step 400
400
#D28E6B
oklch(70.7% 0.096 47.9)
-
Step 500
500
#C57042
oklch(63.1% 0.124 47.8)
-
Step 600
600 (this color)
#B15721
oklch(55.8% 0.134 47.8)
-
Step 700
700
#974612
oklch(49.1% 0.124 47.8)
-
Step 800
800
#7B3A13
oklch(42.7% 0.103 47.6)
-
Step 900
900
#633317
oklch(37.8% 0.08 48.7)
-
Step 950
950
#3A1E0F
oklch(27% 0.05 47.8)
#B15721 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) | #716419 | 0.119 |
| Deuteranopia (no green cones) | #86781F | 0.109 |
| Tritanopia (no blue cones) | #C2434C | 0.076 |
| Achromatopsia (no color) | #707070 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B15721
#B15721
oklch(55.8% 0.134 47.8)
- #007FA6
#007FA6
oklch(55.7% 0.109 228.5)
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 #B15721, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.016
- Cinnamon #AC4F06 ΔE 0.023
- Orangey Brown #B16002 ΔE 0.029
- Raw Umber #A75E09 ΔE 0.030
- Copper #B66325 ΔE 0.030
- Burnt Orange #C04E01 ΔE 0.030
- Brick Orange #C14A09 ΔE 0.035
- Rust Orange #C45508 ΔE 0.036
Use #B15721 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.