#B42733
Closest named color: Firebrick (#B22222). oklch(50.6% 0.176 22.2), rgb(180, 39, 51).
Aa
White text reads best on this color (6.40:1).
About this color
#B42733 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.176 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.018 away. White text reads best on it, at 6.40:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.27:1 |
| White text | 6.40:1 |
Values
| HEX | #B42733 |
| RGB | rgb(180, 39, 51) |
| HSL | hsl(355, 64%, 43%) |
| OKLCH | oklch(50.6% 0.176 22.2) |
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 #B42733 | 6.40:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #B42733 | 3.27:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #B42733 text on white | 6.40:1 | AA | Lc 80.3 | Fine for body text |
| #B42733 text on black | 3.27:1 | AA large text | Lc -21.5 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F7CECB
oklch(88.6% 0.047 23)
-
Step 300
300
#F3ABA8
oklch(80.9% 0.085 21.8)
-
Step 400
400
#E97B79
oklch(70.6% 0.136 22.2)
-
Step 500
500
#DF5457
oklch(63.1% 0.174 22.3)
-
Step 600
600
#CA313C
oklch(55.5% 0.189 22.4)
-
Step 700
700 (this color)
#B42733
oklch(50.6% 0.176 22.2)
-
Step 800
800
#8E1F27
oklch(42.8% 0.146 22.5)
-
Step 900
900
#722124
oklch(37.7% 0.114 22.4)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#B42733 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) | #524C32 | 0.193 |
| Deuteranopia (no green cones) | #756A2E | 0.177 |
| Tritanopia (no blue cones) | #C6002D | 0.037 |
| Achromatopsia (no color) | #5F5F5F | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B42733
#B42733
oklch(50.6% 0.176 22.2)
- #00737A
#00737A
oklch(50.6% 0.086 202.2)
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 #B42733, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.018
- Lipstick Red #C0022F ΔE 0.029
- Scarlet #BE0119 ΔE 0.031
- Rufous #AE2012 ΔE 0.032
- Brown #A52A2A ΔE 0.032
- Rose Red #BE013C ΔE 0.034
- Rouge #AB1239 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.038
Use #B42733 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.