#B52738
Closest named color: Firebrick (#B22222). oklch(50.9% 0.177 20.3), rgb(181, 39, 56).
Aa
White text reads best on this color (6.34:1).
About this color
#B52738 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.177 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.024 away. White text reads best on it, at 6.34:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #B52738 |
| RGB | rgb(181, 39, 56) |
| HSL | hsl(353, 65%, 43%) |
| OKLCH | oklch(50.9% 0.177 20.3) |
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 #B52738 | 6.34:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #B52738 | 3.31:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #B52738 text on white | 6.34:1 | AA | Lc 80.1 | Fine for body text |
| #B52738 text on black | 3.31:1 | AA large text | Lc -21.8 | 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
#F7CDCC
oklch(88.4% 0.048 19.7)
-
Step 300
300
#F3ABA9
oklch(80.9% 0.085 20.9)
-
Step 400
400
#E97B7C
oklch(70.7% 0.136 20.5)
-
Step 500
500
#DF535B
oklch(63.1% 0.175 20.3)
-
Step 600
600
#CB2F41
oklch(55.6% 0.191 20.3)
-
Step 700
700 (this color)
#B52738
oklch(50.9% 0.177 20.3)
-
Step 800
800
#8E1E2B
oklch(42.7% 0.147 20.2)
-
Step 900
900
#722027
oklch(37.6% 0.115 19.9)
-
Step 950
950
#431517
oklch(27% 0.071 20.7)
#B52738 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) | #524C37 | 0.194 |
| Deuteranopia (no green cones) | #756A34 | 0.177 |
| Tritanopia (no blue cones) | #C7002F | 0.037 |
| Achromatopsia (no color) | #5F5F5F | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B52738
#B52738
oklch(50.9% 0.177 20.3)
- #00747A
#00747A
oklch(50.8% 0.086 201.1)
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 #B52738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.024
- Lipstick Red #C0022F ΔE 0.028
- Rose Red #BE013C ΔE 0.030
- Scarlet #BE0119 ΔE 0.034
- Rouge #AB1239 ΔE 0.035
- Brown #A52A2A ΔE 0.037
- Rufous #AE2012 ΔE 0.038
- Dull Red #BB3F3F ΔE 0.041
Use #B52738 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.