#B5243E
Closest named color: Rose Red (#BE013C). oklch(50.8% 0.179 17.3), rgb(181, 36, 62).
Aa
White text reads best on this color (6.38:1).
About this color
#B5243E is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.179 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Rose Red (#BE013C), ΔE 0.025 away. White text reads best on it, at 6.38:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Rose Red (#BE013C) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #B5243E |
| RGB | rgb(181, 36, 62) |
| HSL | hsl(349, 67%, 43%) |
| OKLCH | oklch(50.8% 0.179 17.3) |
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 #B5243E | 6.38:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #B5243E | 3.28:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #B5243E text on white | 6.38:1 | AA | Lc 80.2 | Fine for body text |
| #B5243E text on black | 3.28:1 | AA large text | Lc -21.6 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F8CDCE
oklch(88.6% 0.049 16.5)
-
Step 300
300
#F3AAAC
oklch(80.8% 0.086 17.3)
-
Step 400
400
#EA7A81
oklch(70.8% 0.138 17.3)
-
Step 500
500
#E05161
oklch(63.1% 0.178 17.3)
-
Step 600
600
#CB2D48
oklch(55.6% 0.192 17.3)
-
Step 700
700 (this color)
#B5243E
oklch(50.8% 0.179 17.3)
-
Step 800
800
#8E1C30
oklch(42.7% 0.148 17.1)
-
Step 900
900
#721F2A
oklch(37.6% 0.116 17.3)
-
Step 950
950
#431419
oklch(26.9% 0.073 17.1)
#B5243E 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) | #4F4C3E | 0.199 |
| Deuteranopia (no green cones) | #746A3A | 0.181 |
| Tritanopia (no blue cones) | #C70030 | 0.038 |
| Achromatopsia (no color) | #5F5F5F | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5243E
#B5243E
oklch(50.8% 0.179 17.3)
- #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 #B5243E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rose Red #BE013C ΔE 0.025
- Lipstick Red #C0022F ΔE 0.028
- Rouge #AB1239 ΔE 0.031
- Firebrick #B22222 ΔE 0.032
- Scarlet #BE0119 ΔE 0.039
- Raspberry #B00149 ΔE 0.040
- Brown #A52A2A ΔE 0.041
- Ruby #CA0147 ΔE 0.045
Use #B5243E 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.