#B4152E
Closest named color: Firebrick (#B22222). oklch(49.4% 0.188 21.2), rgb(180, 21, 46).
Aa
White text reads best on this color (6.80:1).
About this color
#B4152E is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.188 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.020 away. White text reads best on it, at 6.80:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #B4152E |
| RGB | rgb(180, 21, 46) |
| HSL | hsl(351, 79%, 39%) |
| OKLCH | oklch(49.4% 0.188 21.2) |
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 #B4152E | 6.80:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #B4152E | 3.08:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #B4152E text on white | 6.80:1 | AA | Lc 81.5 | Fine for body text |
| #B4152E text on black | 3.08:1 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CDCB
oklch(88.6% 0.05 21.2)
-
Step 300
300
#F6A9A7
oklch(80.8% 0.091 20.9)
-
Step 400
400
#ED7878
oklch(70.7% 0.145 21.4)
-
Step 500
500
#E44D56
oklch(63.1% 0.187 21)
-
Step 600
600
#CF253B
oklch(55.5% 0.202 21.1)
-
Step 700
700 (this color)
#B4152E
oklch(49.4% 0.188 21.2)
-
Step 800
800
#911726
oklch(42.7% 0.155 21.3)
-
Step 900
900
#751D23
oklch(37.8% 0.121 21.6)
-
Step 950
950
#451315
oklch(27.1% 0.077 21.6)
#B4152E 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) | #4C462D | 0.208 |
| Deuteranopia (no green cones) | #726628 | 0.189 |
| Tritanopia (no blue cones) | #C60022 | 0.037 |
| Achromatopsia (no color) | #5B5B5B | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4152E
#B4152E
oklch(49.4% 0.188 21.2)
- #006F75
#006F75
oklch(49.3% 0.084 201.4)
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 #B4152E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.020
- Lipstick Red #C0022F ΔE 0.024
- Rouge #AB1239 ΔE 0.025
- Scarlet #BE0119 ΔE 0.026
- Rose Red #BE013C ΔE 0.028
- Rufous #AE2012 ΔE 0.031
- Brown #A52A2A ΔE 0.034
- Raspberry #B00149 ΔE 0.044
Use #B4152E 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.