#B43D00
Closest named color: Sinopia (#BB3E03). oklch(52.5% 0.164 40.1), rgb(180, 61, 0).
Aa
White text reads best on this color (5.82:1).
About this color
#B43D00 is a medium-dark, vivid orange. In OKLCH its lightness is 52%, its chroma 0.164 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.015 away. White text reads best on it, at 5.82:1.
| Hue family | Oranges |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #B43D00 |
| RGB | rgb(180, 61, 0) |
| HSL | hsl(20, 100%, 35%) |
| OKLCH | oklch(52.5% 0.164 40.1) |
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 #B43D00 | 5.82:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #B43D00 | 3.60:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #B43D00 text on white | 5.82:1 | AA | Lc 78.0 | Fine for body text |
| #B43D00 text on black | 3.60:1 | AA large text | Lc -23.8 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F7E5DF
oklch(93.5% 0.021 39.4)
-
Step 200
200
#F2D1C5
oklch(88.5% 0.041 41)
-
Step 300
300
#EBB19D
oklch(80.9% 0.074 39.9)
-
Step 400
400
#DF8666
oklch(70.8% 0.119 40.4)
-
Step 500
500
#D3643B
oklch(63.1% 0.151 40.2)
-
Step 600
600 (this color)
#B43D00
oklch(52.5% 0.164 40.1)
-
Step 700
700
#A43702
oklch(49% 0.153 39.8)
-
Step 800
800
#852F0A
oklch(42.6% 0.126 40)
-
Step 900
900
#6B2B13
oklch(37.6% 0.098 39.9)
-
Step 950
950
#3F1A0D
oklch(27% 0.062 39.6)
#B43D00 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) | #615400 | 0.162 |
| Deuteranopia (no green cones) | #7E6F00 | 0.146 |
| Tritanopia (no blue cones) | #C71534 | 0.073 |
| Achromatopsia (no color) | #656565 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43D00
#B43D00
oklch(52.5% 0.164 40.1)
- #007690
#007690
oklch(52.4% 0.096 220.3)
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 #B43D00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.015
- Rusty Red #AF2F0D ΔE 0.029
- Cinnamon #AC4F06 ΔE 0.036
- Brick Orange #C14A09 ΔE 0.039
- Burnt Umber #A0450E ΔE 0.039
- Russet #A13905 ΔE 0.041
- Burnt Siena #B75203 ΔE 0.043
- Burnt Orange #C04E01 ΔE 0.044
Use #B43D00 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.