#B45313
Closest named color: Burnt Siena (#B75203). oklch(55.6% 0.144 47.7), rgb(180, 83, 19).
Aa
White text reads best on this color (5.01:1).
About this color
#B45313 is a medium-dark, vivid orange. In OKLCH its lightness is 56%, its chroma 0.144 and its hue 48°. 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 5.01:1.
| Hue family | Oranges |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #B45313 |
| RGB | rgb(180, 83, 19) |
| HSL | hsl(24, 81%, 39%) |
| OKLCH | oklch(55.6% 0.144 47.7) |
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 #B45313 | 5.01:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #B45313 | 4.18:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #B45313 text on white | 5.01:1 | AA | Lc 74.0 | Content text, not long reading |
| #B45313 text on black | 4.18:1 | AA large text | Lc -27.7 | 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
#F5E6DF
oklch(93.5% 0.019 46.8)
-
Step 200
200
#EED3C5
oklch(88.6% 0.036 49.2)
-
Step 300
300
#E5B59D
oklch(81% 0.065 47.9)
-
Step 400
400
#D68C67
oklch(70.7% 0.104 47.1)
-
Step 500
500
#C96D3B
oklch(63.1% 0.133 47.4)
-
Step 600
600 (this color)
#B45313
oklch(55.6% 0.144 47.7)
-
Step 700
700
#9B4301
oklch(49.2% 0.134 47.7)
-
Step 800
800
#7E3809
oklch(42.8% 0.111 47.9)
-
Step 900
900
#653113
oklch(37.7% 0.086 47.8)
-
Step 950
950
#3C1D0D
oklch(27% 0.055 46.6)
#B45313 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) | #6F6203 | 0.131 |
| Deuteranopia (no green cones) | #87780F | 0.118 |
| Tritanopia (no blue cones) | #C63C48 | 0.081 |
| Achromatopsia (no color) | #6F6F6F | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B45313
#B45313
oklch(55.6% 0.144 47.7)
- #007FA4
#007FA4
oklch(55.6% 0.108 227.1)
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 #B45313, 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 0.019
- Burnt Orange #C04E01 ΔE 0.023
- Brick Orange #C14A09 ΔE 0.027
- Rust Orange #C45508 ΔE 0.032
- Orangey Brown #B16002 ΔE 0.032
- Raw Umber #A75E09 ΔE 0.035
- Copper #B66325 ΔE 0.036
Use #B45313 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.