#B45100
Closest named color: Burnt Siena (#B75203). oklch(55.2% 0.148 48.9), rgb(180, 81, 0).
Aa
White text reads best on this color (5.10:1).
About this color
#B45100 is a medium-dark, vivid orange. In OKLCH its lightness is 55%, its chroma 0.148 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.007 away. White text reads best on it, at 5.10:1.
| Hue family | Oranges |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #B45100 |
| RGB | rgb(180, 81, 0) |
| HSL | hsl(27, 100%, 35%) |
| OKLCH | oklch(55.2% 0.148 48.9) |
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 #B45100 | 5.10:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #B45100 | 4.11:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #B45100 text on white | 5.10:1 | AA | Lc 74.5 | Content text, not long reading |
| #B45100 text on black | 4.11:1 | AA large text | Lc -27.2 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E6DF
oklch(93.5% 0.019 46.8)
-
Step 200
200
#EFD3C4
oklch(88.6% 0.037 50)
-
Step 300
300
#E5B49B
oklch(80.8% 0.067 48.4)
-
Step 400
400
#D78C63
oklch(70.8% 0.107 49)
-
Step 500
500
#CA6D35
oklch(63.1% 0.137 49.1)
-
Step 600
600 (this color)
#B45100
oklch(55.2% 0.148 48.9)
-
Step 700
700
#9A4400
oklch(49.2% 0.132 48.7)
-
Step 800
800
#7F3701
oklch(42.8% 0.115 48.6)
-
Step 900
900
#66310F
oklch(37.8% 0.088 49.3)
-
Step 950
950
#3C1D0B
oklch(27% 0.056 48.8)
#B45100 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) | #6E6000 | 0.131 |
| Deuteranopia (no green cones) | #867700 | 0.120 |
| Tritanopia (no blue cones) | #C63945 | 0.085 |
| Achromatopsia (no color) | #6E6E6E | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B45100
#B45100
oklch(55.2% 0.148 48.9)
- #007DA4
#007DA4
oklch(55.1% 0.108 228.8)
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 #B45100, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.007
- Cinnamon #AC4F06 ΔE 0.017
- Burnt Orange #C04E01 ΔE 0.023
- Brick Orange #C14A09 ΔE 0.028
- Rust Orange #C45508 ΔE 0.034
- Orangey Brown #B16002 ΔE 0.034
- Raw Umber #A75E09 ΔE 0.035
- Sinopia #BB3E03 ΔE 0.038
Use #B45100 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.