#B52525
Closest named color: Firebrick (#B22222). oklch(50.5% 0.18 26.6), rgb(181, 37, 37).
Aa
White text reads best on this color (6.44:1).
About this color
#B52525 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.180 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.008 away. White text reads best on it, at 6.44:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #B52525 |
| RGB | rgb(181, 37, 37) |
| HSL | hsl(0, 66%, 43%) |
| OKLCH | oklch(50.5% 0.18 26.6) |
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 #B52525 | 6.44:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #B52525 | 3.25:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #B52525 text on white | 6.44:1 | AA | Lc 80.4 | Fine for body text |
| #B52525 text on black | 3.25:1 | AA large text | Lc -21.4 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F8CEC8
oklch(88.6% 0.048 27.6)
-
Step 300
300
#F4ABA3
oklch(80.9% 0.087 26.1)
-
Step 400
400
#EB7B71
oklch(70.7% 0.14 26.5)
-
Step 500
500
#E1534B
oklch(63.1% 0.179 26.7)
-
Step 600
600
#CC2F2E
oklch(55.5% 0.194 26.5)
-
Step 700
700 (this color)
#B52525
oklch(50.5% 0.18 26.6)
-
Step 800
800
#8F1E1D
oklch(42.7% 0.149 26.6)
-
Step 900
900
#73211D
oklch(37.8% 0.116 27)
-
Step 950
950
#441512
oklch(27.1% 0.073 26.7)
#B52525 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) | #534A23 | 0.195 |
| Deuteranopia (no green cones) | #766A1E | 0.179 |
| Tritanopia (no blue cones) | #C80027 | 0.040 |
| Achromatopsia (no color) | #5E5E5E | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B52525
#B52525
oklch(50.5% 0.18 26.6)
- #00727D
#00727D
oklch(50.4% 0.086 206.5)
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 #B52525, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.008
- Rufous #AE2012 ΔE 0.022
- Scarlet #BE0119 ΔE 0.025
- Rusty Red #AF2F0D ΔE 0.027
- Rust Red #AA2704 ΔE 0.032
- Brown #A52A2A ΔE 0.032
- Lipstick Red #C0022F ΔE 0.032
- Rose Red #BE013C ΔE 0.043
Use #B52525 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.