#B4253B
Closest named color: Firebrick (#B22222). oklch(50.6% 0.177 18.6), rgb(180, 37, 59).
Aa
White text reads best on this color (6.42:1).
About this color
#B4253B is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.177 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.027 away. White text reads best on it, at 6.42:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #B4253B |
| RGB | rgb(180, 37, 59) |
| HSL | hsl(351, 66%, 43%) |
| OKLCH | oklch(50.6% 0.177 18.6) |
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 #B4253B | 6.42:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #B4253B | 3.26:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #B4253B text on white | 6.42:1 | AA | Lc 80.4 | Fine for body text |
| #B4253B text on black | 3.26:1 | AA large text | Lc -21.5 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CDCD
oklch(88.4% 0.048 18.1)
-
Step 300
300
#F3ABAB
oklch(81% 0.085 19.1)
-
Step 400
400
#E97A7F
oklch(70.6% 0.137 18.4)
-
Step 500
500
#DF525F
oklch(63% 0.176 18.3)
-
Step 600
600
#CB2F45
oklch(55.7% 0.191 18.8)
-
Step 700
700 (this color)
#B4253B
oklch(50.6% 0.177 18.6)
-
Step 800
800
#8E1D2E
oklch(42.7% 0.147 18.4)
-
Step 900
900
#722029
oklch(37.7% 0.114 18.4)
-
Step 950
950
#431418
oklch(26.9% 0.073 18.4)
#B4253B 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) | #504B3B | 0.196 |
| Deuteranopia (no green cones) | #746937 | 0.178 |
| Tritanopia (no blue cones) | #C6002F | 0.037 |
| Achromatopsia (no color) | #5F5F5F | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4253B
#B4253B
oklch(50.6% 0.177 18.6)
- #007477
#007477
oklch(50.7% 0.086 197.9)
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 #B4253B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.027
- Rose Red #BE013C ΔE 0.028
- Lipstick Red #C0022F ΔE 0.029
- Rouge #AB1239 ΔE 0.030
- Scarlet #BE0119 ΔE 0.037
- Brown #A52A2A ΔE 0.037
- Rufous #AE2012 ΔE 0.041
- Raspberry #B00149 ΔE 0.043
Use #B4253B 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.