#B40027
Closest named color: Scarlet (#BE0119). oklch(48.6% 0.196 21.9), rgb(180, 0, 39).
Aa
White text reads best on this color (7.07:1).
About this color
#B40027 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.196 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.025 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 | #B40027 |
| RGB | rgb(180, 0, 39) |
| HSL | hsl(347, 100%, 35%) |
| OKLCH | oklch(48.6% 0.196 21.9) |
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 #B40027 | 7.07:1 | AAA | Lc -87.0 | Fine for body text |
| Black text on #B40027 | 2.96:1 | Fails | Lc 22.2 | Dividers and decoration only |
| #B40027 text on white | 7.07:1 | AAA | Lc 81.9 | Fine for body text |
| #B40027 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FACCCA
oklch(88.4% 0.052 21.1)
-
Step 300
300
#F8A8A5
oklch(80.8% 0.095 21.8)
-
Step 400
400
#F07675
oklch(70.7% 0.151 22.1)
-
Step 500
500
#E74951
oklch(63.1% 0.194 22)
-
Step 600
600
#D21C36
oklch(55.5% 0.21 21.7)
-
Step 700
700 (this color)
#B40027
oklch(48.6% 0.196 21.9)
-
Step 800
800
#931023
oklch(42.6% 0.162 21.7)
-
Step 900
900
#761A21
oklch(37.6% 0.126 21.9)
-
Step 950
950
#461214
oklch(27.1% 0.08 22)
#B40027 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) | #484226 | 0.219 |
| Deuteranopia (no green cones) | #706520 | 0.199 |
| Tritanopia (no blue cones) | #C70017 | 0.043 |
| Achromatopsia (no color) | #585858 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40027
#B40027
oklch(48.6% 0.196 21.9)
- #006D73
#006D73
oklch(48.7% 0.083 201.5)
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 #B40027, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.025
- Firebrick #B22222 ΔE 0.025
- Rouge #AB1239 ΔE 0.027
- Lipstick Red #C0022F ΔE 0.027
- Rose Red #BE013C ΔE 0.032
- Rufous #AE2012 ΔE 0.032
- Brown #A52A2A ΔE 0.038
- Rust Red #AA2704 ΔE 0.045
Use #B40027 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.