#B03239
Closest named color: Firebrick (#B22222). oklch(51% 0.162 22.1), rgb(176, 50, 57).
Aa
White text reads best on this color (6.24:1).
About this color
#B03239 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.162 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.026 away. White text reads best on it, at 6.24:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #B03239 |
| RGB | rgb(176, 50, 57) |
| HSL | hsl(357, 56%, 44%) |
| OKLCH | oklch(51% 0.162 22.1) |
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 #B03239 | 6.24:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #B03239 | 3.36:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #B03239 text on white | 6.24:1 | AA | Lc 80.0 | Fine for body text |
| #B03239 text on black | 3.36:1 | AA large text | Lc -21.8 | 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 700.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CFCC
oklch(88.6% 0.043 23.3)
-
Step 300
300
#EFADAA
oklch(80.9% 0.078 21.9)
-
Step 400
400
#E47F7D
oklch(70.7% 0.125 21.9)
-
Step 500
500
#D95A5C
oklch(63.1% 0.16 21.9)
-
Step 600
600
#C53B42
oklch(55.7% 0.174 22.2)
-
Step 700
700 (this color)
#B03239
oklch(51% 0.162 22.1)
-
Step 800
800
#8A262B
oklch(42.8% 0.135 22.3)
-
Step 900
900
#6F2527
oklch(37.7% 0.105 22.1)
-
Step 950
950
#411717
oklch(27% 0.066 22.5)
#B03239 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) | #554F38 | 0.176 |
| Deuteranopia (no green cones) | #756A35 | 0.161 |
| Tritanopia (no blue cones) | #C10636 | 0.044 |
| Achromatopsia (no color) | #606060 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03239
#B03239
oklch(51% 0.162 22.1)
- #00747B
#00747B
oklch(50.9% 0.087 202.2)
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 #B03239, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.026
- Brown #A52A2A ΔE 0.031
- Dull Red #BB3F3F ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.038
- Rufous #AE2012 ΔE 0.038
- Brick #A03623 ΔE 0.042
- Rouge #AB1239 ΔE 0.043
- Lipstick Red #C0022F ΔE 0.043
Use #B03239 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.