#B40024
Closest named color: Scarlet (#BE0119). oklch(48.6% 0.196 22.7), rgb(180, 0, 36).
Aa
White text reads best on this color (7.07:1).
About this color
#B40024 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.196 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.024 away. White text reads best on it, at 7.07:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #B40024 |
| RGB | rgb(180, 0, 36) |
| HSL | hsl(348, 100%, 35%) |
| OKLCH | oklch(48.6% 0.196 22.7) |
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 #B40024 | 7.07:1 | AAA | Lc -87.0 | Fine for body text |
| Black text on #B40024 | 2.96:1 | Fails | Lc 22.2 | Dividers and decoration only |
| #B40024 text on white | 7.07:1 | AAA | Lc 81.9 | Fine for body text |
| #B40024 text on black | 2.96:1 | Fails | Lc -20.0 | 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
#FACCC9
oklch(88.4% 0.052 22.6)
-
Step 300
300
#F8A8A4
oklch(80.8% 0.095 22.5)
-
Step 400
400
#F07673
oklch(70.7% 0.151 23.1)
-
Step 500
500
#E7494F
oklch(63% 0.194 22.7)
-
Step 600
600
#D31D33
oklch(55.7% 0.211 22.8)
-
Step 700
700 (this color)
#B40024
oklch(48.6% 0.196 22.7)
-
Step 800
800
#941020
oklch(42.8% 0.163 22.9)
-
Step 900
900
#771A20
oklch(37.8% 0.127 22.6)
-
Step 950
950
#461213
oklch(27.1% 0.08 23.1)
#B40024 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) | #494223 | 0.217 |
| Deuteranopia (no green cones) | #71641C | 0.196 |
| Tritanopia (no blue cones) | #C70015 | 0.042 |
| Achromatopsia (no color) | #585858 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40024
#B40024
oklch(48.6% 0.196 22.7)
- #006D74
#006D74
oklch(48.7% 0.083 202.6)
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 #B40024, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.024
- Firebrick #B22222 ΔE 0.024
- Lipstick Red #C0022F ΔE 0.028
- Rouge #AB1239 ΔE 0.029
- Rufous #AE2012 ΔE 0.030
- Rose Red #BE013C ΔE 0.034
- Brown #A52A2A ΔE 0.038
- Rust Red #AA2704 ΔE 0.043
Use #B40024 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.