#B55024
Closest named color: Burnt Siena (#B75203). oklch(55.4% 0.143 42), rgb(181, 80, 36).
Aa
White text reads best on this color (5.07:1).
About this color
#B55024 is a medium-dark, vivid orange. In OKLCH its lightness is 55%, its chroma 0.143 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.018 away. White text reads best on it, at 5.07:1.
| Hue family | Oranges |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.143) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #B55024 |
| RGB | rgb(181, 80, 36) |
| HSL | hsl(18, 67%, 43%) |
| OKLCH | oklch(55.4% 0.143 42) |
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 #B55024 | 5.07:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #B55024 | 4.13:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #B55024 text on white | 5.07:1 | AA | Lc 74.4 | Content text, not long reading |
| #B55024 text on black | 4.13:1 | AA large text | Lc -27.3 | 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
#F6E6E0
oklch(93.6% 0.019 41.8)
-
Step 200
200
#EFD2C7
oklch(88.5% 0.036 41.9)
-
Step 300
300
#E6B4A0
oklch(81% 0.065 42.9)
-
Step 400
400
#D78B6D
oklch(70.8% 0.103 42.3)
-
Step 500
500
#CA6B45
oklch(63% 0.131 41.9)
-
Step 600
600 (this color)
#B55024
oklch(55.4% 0.143 42)
-
Step 700
700
#9C4117
oklch(49.1% 0.132 42.2)
-
Step 800
800
#7F3616
oklch(42.7% 0.11 42.1)
-
Step 900
900
#663019
oklch(37.7% 0.085 42.6)
-
Step 950
950
#3C1C10
oklch(26.9% 0.054 40.9)
#B55024 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) | #6C601E | 0.137 |
| Deuteranopia (no green cones) | #857721 | 0.125 |
| Tritanopia (no blue cones) | #C73947 | 0.071 |
| Achromatopsia (no color) | #6E6E6E | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B55024
#B55024
oklch(55.4% 0.143 42)
- #007F9D
#007F9D
oklch(55.3% 0.102 222)
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 #B55024, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.018
- Burnt Orange #C04E01 ΔE 0.024
- Brick Orange #C14A09 ΔE 0.024
- Cinnamon #AC4F06 ΔE 0.025
- Sinopia #BB3E03 ΔE 0.033
- Rust Orange #C45508 ΔE 0.035
- Sienna #A0522D ΔE 0.039
- Copper #B66325 ΔE 0.044
Use #B55024 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.