#B3510C
Closest named color: Burnt Siena (#B75203). oklch(55.1% 0.146 47.8), rgb(179, 81, 12).
Aa
White text reads best on this color (5.12:1).
About this color
#B3510C is a medium-dark, vivid orange. In OKLCH its lightness is 55%, its chroma 0.146 and its hue 48°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.009 away. White text reads best on it, at 5.12:1.
| Hue family | Oranges |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.09:1 |
| White text | 5.12:1 |
Values
| HEX | #B3510C |
| RGB | rgb(179, 81, 12) |
| HSL | hsl(25, 87%, 37%) |
| OKLCH | oklch(55.1% 0.146 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 #B3510C | 5.12:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #B3510C | 4.09:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #B3510C text on white | 5.12:1 | AA | Lc 74.6 | Content text, not long reading |
| #B3510C text on black | 4.09:1 | AA large text | Lc -27.1 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E6DF
oklch(93.5% 0.019 46.8)
-
Step 200
200
#EED3C5
oklch(88.6% 0.036 49.2)
-
Step 300
300
#E5B59C
oklch(81% 0.066 48.9)
-
Step 400
400
#D68C66
oklch(70.7% 0.105 47.7)
-
Step 500
500
#C96D3A
oklch(63.1% 0.133 47.7)
-
Step 600
600 (this color)
#B3510C
oklch(55.1% 0.146 47.8)
-
Step 700
700
#9B4300
oklch(49.2% 0.134 47.9)
-
Step 800
800
#7E3707
oklch(42.6% 0.112 47.6)
-
Step 900
900
#663112
oklch(37.8% 0.087 47.9)
-
Step 950
950
#3C1D0C
oklch(27% 0.056 47.7)
#B3510C 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) | #857606 | 0.119 |
| Tritanopia (no blue cones) | #C53A45 | 0.081 |
| Achromatopsia (no color) | #6E6E6E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B3510C
#B3510C
oklch(55.1% 0.146 47.8)
- #007DA3
#007DA3
oklch(55.1% 0.108 228.2)
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 #B3510C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.009
- Cinnamon #AC4F06 ΔE 0.015
- Burnt Orange #C04E01 ΔE 0.024
- Brick Orange #C14A09 ΔE 0.028
- Orangey Brown #B16002 ΔE 0.035
- Rust Orange #C45508 ΔE 0.035
- Raw Umber #A75E09 ΔE 0.035
- Sinopia #BB3E03 ΔE 0.037
Use #B3510C 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.