#B43B16
Closest named color: Sinopia (#BB3E03). oklch(52.3% 0.163 36.3), rgb(180, 59, 22).
Aa
White text reads best on this color (5.86:1).
About this color
#B43B16 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.163 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.018 away. White text reads best on it, at 5.86:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.57:1 |
| White text | 5.86:1 |
Values
| HEX | #B43B16 |
| RGB | rgb(180, 59, 22) |
| HSL | hsl(14, 78%, 40%) |
| OKLCH | oklch(52.3% 0.163 36.3) |
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 #B43B16 | 5.86:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #B43B16 | 3.57:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #B43B16 text on white | 5.86:1 | AA | Lc 78.3 | Fine for body text |
| #B43B16 text on black | 3.57:1 | AA large text | Lc -23.5 | 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 700.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EFAF9D
oklch(80.9% 0.08 36.3)
-
Step 400
400
#E38267
oklch(70.6% 0.126 36.4)
-
Step 500
500
#D95E3C
oklch(63.1% 0.163 36.3)
-
Step 600
600
#C44017
oklch(55.6% 0.175 36.3)
-
Step 700
700 (this color)
#B43B16
oklch(52.3% 0.163 36.3)
-
Step 800
800
#892A0C
oklch(42.7% 0.135 36.4)
-
Step 900
900
#6E2814
oklch(37.7% 0.105 36.5)
-
Step 950
950
#41180D
oklch(27% 0.067 36)
#B43B16 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) | #5F530E | 0.167 |
| Deuteranopia (no green cones) | #7D6F0E | 0.152 |
| Tritanopia (no blue cones) | #C71234 | 0.066 |
| Achromatopsia (no color) | #656565 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43B16
#B43B16
oklch(52.3% 0.163 36.3)
- #00778C
#00778C
oklch(52.4% 0.093 215.7)
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 #B43B16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.024
- Dull Red #BB3F3F ΔE 0.040
- Russet #A13905 ΔE 0.041
- Rust Red #AA2704 ΔE 0.041
- Firebrick #B22222 ΔE 0.042
- Burnt Umber #A0450E ΔE 0.042
- Brick Orange #C14A09 ΔE 0.043
Use #B43B16 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.