#B40C3F
Closest named color: Rouge (#AB1239). oklch(49.4% 0.192 14), rgb(180, 12, 63).
Aa
White text reads best on this color (6.85:1).
About this color
#B40C3F is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.192 and its hue 14°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.020 away. White text reads best on it, at 6.85:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.192) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #B40C3F |
| RGB | rgb(180, 12, 63) |
| HSL | hsl(342, 88%, 38%) |
| OKLCH | oklch(49.4% 0.192 14) |
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 #B40C3F | 6.85:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #B40C3F | 3.06:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #B40C3F text on white | 6.85:1 | AA | Lc 81.5 | Fine for body text |
| #B40C3F text on black | 3.06:1 | AA large text | Lc -20.4 | 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
#FEF2F3
oklch(97.1% 0.013 11.5)
-
Step 100
100
#FBE3E4
oklch(93.6% 0.026 14.7)
-
Step 200
200
#F9CCCF
oklch(88.5% 0.051 13.7)
-
Step 300
300
#F6A8AE
oklch(80.8% 0.092 14.3)
-
Step 400
400
#EE7584
oklch(70.7% 0.149 13.9)
-
Step 500
500
#E44A66
oklch(63.1% 0.19 13.9)
-
Step 600
600
#CF1F4D
oklch(55.5% 0.206 14)
-
Step 700
700 (this color)
#B40C3F
oklch(49.4% 0.192 14)
-
Step 800
800
#911234
oklch(42.6% 0.159 13.7)
-
Step 900
900
#751A2D
oklch(37.7% 0.124 13.9)
-
Step 950
950
#45121B
oklch(27.1% 0.078 13.6)
#B40C3F 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) | #47453F | 0.216 |
| Deuteranopia (no green cones) | #6F663A | 0.196 |
| Tritanopia (no blue cones) | #C60026 | 0.047 |
| Achromatopsia (no color) | #5A5A5A | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40C3F
#B40C3F
oklch(49.4% 0.192 14)
- #00706F
#00706F
oklch(49.3% 0.084 193.7)
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 #B40C3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.020
- Rose Red #BE013C ΔE 0.020
- Raspberry #B00149 ΔE 0.021
- Lipstick Red #C0022F ΔE 0.032
- Firebrick #B22222 ΔE 0.044
- Scarlet #BE0119 ΔE 0.045
- Ruby #CA0147 ΔE 0.046
- Brown #A52A2A ΔE 0.050
Use #B40C3F 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.