#BB2B31
Closest named color: Firebrick (#B22222). oklch(52.2% 0.18 24.2), rgb(187, 43, 49).
Aa
White text reads best on this color (5.99:1).
About this color
#BB2B31 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.180 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.027 away. White text reads best on it, at 5.99:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #BB2B31 |
| RGB | rgb(187, 43, 49) |
| HSL | hsl(357, 63%, 45%) |
| OKLCH | oklch(52.2% 0.18 24.2) |
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 #BB2B31 | 5.99:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #BB2B31 | 3.50:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #BB2B31 text on white | 5.99:1 | AA | Lc 78.5 | Fine for body text |
| #BB2B31 text on black | 3.50:1 | AA large text | Lc -23.3 | 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
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F8CDCA
oklch(88.4% 0.049 22.8)
-
Step 300
300
#F4ABA5
oklch(80.9% 0.087 24.4)
-
Step 400
400
#EB7B75
oklch(70.8% 0.139 24.4)
-
Step 500
500
#E15251
oklch(63.1% 0.179 24.1)
-
Step 600
600
#CC2E35
oklch(55.5% 0.194 24.2)
-
Step 700
700 (this color)
#BB2B31
oklch(52.2% 0.18 24.2)
-
Step 800
800
#8F1D22
oklch(42.7% 0.149 24.3)
-
Step 900
900
#732021
oklch(37.7% 0.116 24)
-
Step 950
950
#441414
oklch(27% 0.074 23.5)
#BB2B31 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) | #574F30 | 0.195 |
| Deuteranopia (no green cones) | #7A6E2C | 0.179 |
| Tritanopia (no blue cones) | #CE002F | 0.041 |
| Achromatopsia (no color) | #636363 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB2B31
#BB2B31
oklch(52.2% 0.18 24.2)
- #007881
#007881
oklch(52.2% 0.089 204)
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 #BB2B31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.027
- Lipstick Red #C0022F ΔE 0.029
- Dull Red #BB3F3F ΔE 0.030
- Scarlet #BE0119 ΔE 0.031
- Rose Red #BE013C ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.039
- Rufous #AE2012 ΔE 0.040
- Cherry #CF0234 ΔE 0.043
Use #BB2B31 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.