#B3521C
Closest named color: Burnt Siena (#B75203). oklch(55.3% 0.141 45.6), rgb(179, 82, 28).
Aa
White text reads best on this color (5.07:1).
About this color
#B3521C is a medium-dark, vivid orange. In OKLCH its lightness is 55%, its chroma 0.141 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.012 away. White text reads best on it, at 5.07:1.
| Hue family | Oranges |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #B3521C |
| RGB | rgb(179, 82, 28) |
| HSL | hsl(21, 73%, 41%) |
| OKLCH | oklch(55.3% 0.141 45.6) |
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 #B3521C | 5.07:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #B3521C | 4.14:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #B3521C text on white | 5.07:1 | AA | Lc 74.4 | Content text, not long reading |
| #B3521C text on black | 4.14:1 | 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
#F5E6E0
oklch(93.5% 0.018 43.2)
-
Step 200
200
#EED3C6
oklch(88.6% 0.035 47.4)
-
Step 300
300
#E4B49F
oklch(80.8% 0.063 44.8)
-
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)
#B3521C
oklch(55.3% 0.141 45.6)
-
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)
#B3521C 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) | #6E6113 | 0.130 |
| Deuteranopia (no green cones) | #857719 | 0.119 |
| Tritanopia (no blue cones) | #C53C48 | 0.076 |
| Achromatopsia (no color) | #6E6E6E | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B3521C
#B3521C
oklch(55.3% 0.141 45.6)
- #007EA1
#007EA1
oklch(55.2% 0.106 225.9)
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 #B3521C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.012
- Cinnamon #AC4F06 ΔE 0.019
- Burnt Orange #C04E01 ΔE 0.025
- Brick Orange #C14A09 ΔE 0.028
- Rust Orange #C45508 ΔE 0.035
- Orangey Brown #B16002 ΔE 0.037
- Sinopia #BB3E03 ΔE 0.037
- Sienna #A0522D ΔE 0.038
Use #B3521C 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.