#B45337
Closest named color: Burnt Siena (#B75203). oklch(55.9% 0.133 36.9), rgb(180, 83, 55).
Aa
White text reads best on this color (4.96:1).
About this color
#B45337 is a medium-dark, moderately saturated red. In OKLCH its lightness is 56%, its chroma 0.133 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.033 away. White text reads best on it, at 4.96:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.133) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.23:1 |
| White text | 4.96:1 |
Values
| HEX | #B45337 |
| RGB | rgb(180, 83, 55) |
| HSL | hsl(13, 53%, 46%) |
| OKLCH | oklch(55.9% 0.133 36.9) |
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 #B45337 | 4.96:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #B45337 | 4.23:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #B45337 text on white | 4.96:1 | AA | Lc 73.8 | Content text, not long reading |
| #B45337 text on black | 4.23:1 | AA large text | Lc -27.9 | 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
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EED2CA
oklch(88.5% 0.033 36.5)
-
Step 300
300
#E4B4A6
oklch(80.9% 0.06 36.9)
-
Step 400
400
#D58B76
oklch(70.7% 0.096 36.6)
-
Step 500
500
#C86C52
oklch(63.1% 0.123 36.7)
-
Step 600
600 (this color)
#B45337
oklch(55.9% 0.133 36.9)
-
Step 700
700
#9A4229
oklch(49.1% 0.124 36.6)
-
Step 800
800
#7D3723
oklch(42.7% 0.103 36.8)
-
Step 900
900
#653021
oklch(37.7% 0.081 36.7)
-
Step 950
950
#3B1D14
oklch(27% 0.05 37.5)
#B45337 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) | #6D6334 | 0.131 |
| Deuteranopia (no green cones) | #857835 | 0.120 |
| Tritanopia (no blue cones) | #C53F4D | 0.060 |
| Achromatopsia (no color) | #707070 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B45337
#B45337
oklch(55.9% 0.133 36.9)
- #00829A
#00829A
oklch(55.9% 0.1 216.8)
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 #B45337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.033
- Brick Orange #C14A09 ΔE 0.035
- Burnt Orange #C04E01 ΔE 0.036
- Cinnamon #AC4F06 ΔE 0.038
- Sienna #A0522D ΔE 0.041
- Sinopia #BB3E03 ΔE 0.043
- Dusty Red #B9484E ΔE 0.043
- Rust Orange #C45508 ΔE 0.043
Use #B45337 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.