#B5001E
Closest named color: Scarlet (#BE0119). oklch(48.7% 0.197 24.4), rgb(181, 0, 30).
Aa
White text reads best on this color (7.03:1).
About this color
#B5001E is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.197 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.020 away. White text reads best on it, at 7.03:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.197) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #B5001E |
| RGB | rgb(181, 0, 30) |
| HSL | hsl(350, 100%, 35%) |
| OKLCH | oklch(48.7% 0.197 24.4) |
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 #B5001E | 7.03:1 | AAA | Lc -86.8 | Fine for body text |
| Black text on #B5001E | 2.98:1 | Fails | Lc 22.3 | Dividers and decoration only |
| #B5001E text on white | 7.03:1 | AAA | Lc 81.7 | Fine for body text |
| #B5001E text on black | 2.98:1 | Fails | Lc -20.2 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC8
oklch(88.5% 0.054 23.9)
-
Step 300
300
#F8A9A2
oklch(80.9% 0.094 25)
-
Step 400
400
#F17670
oklch(70.8% 0.153 24.6)
-
Step 500
500
#E8494A
oklch(63.1% 0.196 24.4)
-
Step 600
600
#D31C2C
oklch(55.6% 0.212 24.5)
-
Step 700
700 (this color)
#B5001E
oklch(48.7% 0.197 24.4)
-
Step 800
800
#94101C
oklch(42.7% 0.163 24.4)
-
Step 900
900
#771A1D
oklch(37.8% 0.127 24.2)
-
Step 950
950
#461211
oklch(27% 0.08 25.2)
#B5001E 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) | #4A421C | 0.218 |
| Deuteranopia (no green cones) | #726514 | 0.197 |
| Tritanopia (no blue cones) | #C80012 | 0.041 |
| Achromatopsia (no color) | #595959 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5001E
#B5001E
oklch(48.7% 0.197 24.4)
- #006D76
#006D76
oklch(48.8% 0.083 204.8)
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 #B5001E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.020
- Firebrick #B22222 ΔE 0.021
- Rufous #AE2012 ΔE 0.026
- Lipstick Red #C0022F ΔE 0.029
- Rouge #AB1239 ΔE 0.034
- Rose Red #BE013C ΔE 0.037
- Brown #A52A2A ΔE 0.038
- Rust Red #AA2704 ΔE 0.040
Use #B5001E 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.