#B25129
Closest named color: Burnt Siena (#B75203). oklch(55.1% 0.137 41.5), rgb(178, 81, 41).
Aa
White text reads best on this color (5.11:1).
About this color
#B25129 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 55%, its chroma 0.137 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.022 away. White text reads best on it, at 5.11:1.
| Hue family | Browns |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.137) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #B25129 |
| RGB | rgb(178, 81, 41) |
| HSL | hsl(18, 63%, 43%) |
| OKLCH | oklch(55.1% 0.137 41.5) |
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 #B25129 | 5.11:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #B25129 | 4.10:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #B25129 text on white | 5.11:1 | AA | Lc 74.7 | Content text, not long reading |
| #B25129 text on black | 4.10:1 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EED2C8
oklch(88.4% 0.034 40.7)
-
Step 300
300
#E4B4A2
oklch(80.8% 0.061 41.5)
-
Step 400
400
#D58C70
oklch(70.8% 0.098 41.7)
-
Step 500
500
#C86D49
oklch(63.1% 0.126 41.8)
-
Step 600
600 (this color)
#B25129
oklch(55.1% 0.137 41.5)
-
Step 700
700
#9A421D
oklch(49% 0.128 41.4)
-
Step 800
800
#7D371A
oklch(42.6% 0.106 41.6)
-
Step 900
900
#65311C
oklch(37.8% 0.082 41.9)
-
Step 950
950
#3B1D11
oklch(26.9% 0.052 42.1)
#B25129 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) | #6C6024 | 0.131 |
| Deuteranopia (no green cones) | #847626 | 0.120 |
| Tritanopia (no blue cones) | #C33C49 | 0.068 |
| Achromatopsia (no color) | #6E6E6E | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B25129
#B25129
oklch(55.1% 0.137 41.5)
- #007F9C
#007F9C
oklch(55.2% 0.101 221.2)
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 #B25129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.022
- Cinnamon #AC4F06 ΔE 0.024
- Burnt Orange #C04E01 ΔE 0.030
- Brick Orange #C14A09 ΔE 0.031
- Sienna #A0522D ΔE 0.034
- Sinopia #BB3E03 ΔE 0.036
- Rust Orange #C45508 ΔE 0.041
- Copper #B66325 ΔE 0.044
Use #B25129 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.