#B2511B
Closest named color: Burnt Siena (#B75203). oklch(55% 0.141 45.5), rgb(178, 81, 27).
Aa
White text reads best on this color (5.13:1).
About this color
#B2511B is a medium-dark, vivid orange. In OKLCH its lightness is 55%, its chroma 0.141 and its hue 45°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.014 away. White text reads best on it, at 5.13:1.
| Hue family | Oranges |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #B2511B |
| RGB | rgb(178, 81, 27) |
| HSL | hsl(21, 74%, 40%) |
| OKLCH | oklch(55% 0.141 45.5) |
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 #B2511B | 5.13:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #B2511B | 4.08:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #B2511B text on white | 5.13:1 | AA | Lc 74.8 | Content text, not long reading |
| #B2511B text on black | 4.08:1 | AA large text | Lc -26.9 | 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
#F5E6E0
oklch(93.5% 0.018 43.2)
-
Step 200
200
#EED2C6
oklch(88.4% 0.035 44.6)
-
Step 300
300
#E5B49F
oklch(80.9% 0.064 44.3)
-
Step 400
400
#D58C6A
oklch(70.7% 0.101 45.6)
-
Step 500
500
#C96D40
oklch(63.1% 0.131 45.5)
-
Step 600
600 (this color)
#B2511B
oklch(55% 0.141 45.5)
-
Step 700
700
#9B430E
oklch(49.2% 0.132 45.7)
-
Step 800
800
#7E3811
oklch(42.9% 0.109 45.7)
-
Step 900
900
#653116
oklch(37.7% 0.084 46)
-
Step 950
950
#3C1D0E
oklch(27.1% 0.055 45.4)
#B2511B 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) | #6D6012 | 0.130 |
| Deuteranopia (no green cones) | #847618 | 0.119 |
| Tritanopia (no blue cones) | #C43B47 | 0.076 |
| Achromatopsia (no color) | #6D6D6D | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B2511B
#B2511B
oklch(55% 0.141 45.5)
- #007DA0
#007DA0
oklch(54.9% 0.105 226.1)
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 #B2511B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.014
- Cinnamon #AC4F06 ΔE 0.016
- Burnt Orange #C04E01 ΔE 0.027
- Brick Orange #C14A09 ΔE 0.029
- Sienna #A0522D ΔE 0.035
- Sinopia #BB3E03 ΔE 0.036
- Rust Orange #C45508 ΔE 0.038
- Raw Umber #A75E09 ΔE 0.038
Use #B2511B 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.