#B52F3B
Closest named color: Firebrick (#B22222). oklch(51.7% 0.17 20.9), rgb(181, 47, 59).
Aa
White text reads best on this color (6.11:1).
About this color
#B52F3B is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.170 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.029 away. White text reads best on it, at 6.11:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #B52F3B |
| RGB | rgb(181, 47, 59) |
| HSL | hsl(355, 59%, 45%) |
| OKLCH | oklch(51.7% 0.17 20.9) |
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 #B52F3B | 6.11:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #B52F3B | 3.43:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #B52F3B text on white | 6.11:1 | AA | Lc 79.3 | Fine for body text |
| #B52F3B text on black | 3.43:1 | AA large text | Lc -22.6 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F1ACAA
oklch(80.9% 0.082 20.9)
-
Step 400
400
#E77D7D
oklch(70.8% 0.131 20.9)
-
Step 500
500
#DC565C
oklch(63% 0.168 20.7)
-
Step 600
600
#C83542
oklch(55.6% 0.183 20.9)
-
Step 700
700 (this color)
#B52F3B
oklch(51.7% 0.17 20.9)
-
Step 800
800
#8C222B
oklch(42.7% 0.141 21.1)
-
Step 900
900
#702327
oklch(37.7% 0.109 21.1)
-
Step 950
950
#421617
oklch(27% 0.069 21.5)
#B52F3B 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) | #55503A | 0.186 |
| Deuteranopia (no green cones) | #776C37 | 0.170 |
| Tritanopia (no blue cones) | #C70035 | 0.042 |
| Achromatopsia (no color) | #626262 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B52F3B
#B52F3B
oklch(51.7% 0.17 20.9)
- #00777C
#00777C
oklch(51.7% 0.088 199.9)
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 #B52F3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.029
- Dull Red #BB3F3F ΔE 0.031
- Lipstick Red #C0022F ΔE 0.035
- Rose Red #BE013C ΔE 0.038
- Brown #A52A2A ΔE 0.040
- Scarlet #BE0119 ΔE 0.040
- Rufous #AE2012 ΔE 0.042
- Rusty Red #AF2F0D ΔE 0.043
Use #B52F3B 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.