#B40034
Closest named color: Rouge (#AB1239). oklch(48.8% 0.196 17.5), rgb(180, 0, 52).
Aa
White text reads best on this color (7.02:1).
About this color
#B40034 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.196 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.019 away. White text reads best on it, at 7.02:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.99:1 |
| White text | 7.02:1 |
Values
| HEX | #B40034 |
| RGB | rgb(180, 0, 52) |
| HSL | hsl(343, 100%, 35%) |
| OKLCH | oklch(48.8% 0.196 17.5) |
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 #B40034 | 7.02:1 | AAA | Lc -86.8 | Fine for body text |
| Black text on #B40034 | 2.99:1 | Fails | Lc 22.3 | Dividers and decoration only |
| #B40034 text on white | 7.02:1 | AAA | Lc 81.7 | Fine for body text |
| #B40034 text on black | 2.99:1 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E3
oklch(93.6% 0.028 17.7)
-
Step 200
200
#FACCCC
oklch(88.5% 0.052 18.2)
-
Step 300
300
#F8A8AA
oklch(81% 0.095 17.7)
-
Step 400
400
#F0757D
oklch(70.8% 0.152 17.7)
-
Step 500
500
#E6485D
oklch(63% 0.193 17.2)
-
Step 600
600
#D21B43
oklch(55.7% 0.21 17.5)
-
Step 700
700 (this color)
#B40034
oklch(48.8% 0.196 17.5)
-
Step 800
800
#930F2C
oklch(42.7% 0.162 17.6)
-
Step 900
900
#761928
oklch(37.7% 0.126 17.1)
-
Step 950
950
#461117
oklch(27% 0.081 18)
#B40034 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) | #474334 | 0.219 |
| Deuteranopia (no green cones) | #6F652F | 0.199 |
| Tritanopia (no blue cones) | #C6001D | 0.046 |
| Achromatopsia (no color) | #595959 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40034
#B40034
oklch(48.8% 0.196 17.5)
- #006E70
#006E70
oklch(48.8% 0.083 197)
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 #B40034, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.019
- Rose Red #BE013C ΔE 0.023
- Lipstick Red #C0022F ΔE 0.027
- Raspberry #B00149 ΔE 0.031
- Scarlet #BE0119 ΔE 0.035
- Firebrick #B22222 ΔE 0.035
- Brown #A52A2A ΔE 0.044
- Rufous #AE2012 ΔE 0.045
Use #B40034 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.