#B0303E
Closest named color: Firebrick (#B22222). oklch(50.9% 0.164 19.3), rgb(176, 48, 62).
Aa
White text reads best on this color (6.29:1).
About this color
#B0303E is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.164 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.030 away. White text reads best on it, at 6.29:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #B0303E |
| RGB | rgb(176, 48, 62) |
| HSL | hsl(353, 57%, 44%) |
| OKLCH | oklch(50.9% 0.164 19.3) |
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 #B0303E | 6.29:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #B0303E | 3.33:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #B0303E text on white | 6.29:1 | AA | Lc 80.1 | Fine for body text |
| #B0303E text on black | 3.33:1 | AA large text | Lc -21.7 | 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 700.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECD
oklch(88.4% 0.044 19.8)
-
Step 300
300
#F0ACAC
oklch(80.9% 0.08 19)
-
Step 400
400
#E57E80
oklch(70.7% 0.127 19.6)
-
Step 500
500
#DA5961
oklch(63.2% 0.162 19.3)
-
Step 600
600
#C53948
oklch(55.6% 0.176 19.2)
-
Step 700
700 (this color)
#B0303E
oklch(50.9% 0.164 19.3)
-
Step 800
800
#8A252F
oklch(42.8% 0.135 19.7)
-
Step 900
900
#6F242A
oklch(37.7% 0.106 19.2)
-
Step 950
950
#411619
oklch(26.9% 0.067 18.6)
#B0303E 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) | #534F3E | 0.180 |
| Deuteranopia (no green cones) | #746A3A | 0.165 |
| Tritanopia (no blue cones) | #C10236 | 0.042 |
| Achromatopsia (no color) | #606060 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0303E
#B0303E
oklch(50.9% 0.164 19.3)
- #007479
#007479
oklch(50.8% 0.086 200.1)
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 #B0303E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.030
- Brown #A52A2A ΔE 0.034
- Dull Red #BB3F3F ΔE 0.038
- Rouge #AB1239 ΔE 0.038
- Rose Red #BE013C ΔE 0.041
- Lipstick Red #C0022F ΔE 0.041
- Rufous #AE2012 ΔE 0.042
- Light Burgundy #A8415B ΔE 0.043
Use #B0303E 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.