#B53B40
Closest named color: Dull Red (#BB3F3F). oklch(53% 0.158 22.1), rgb(181, 59, 64).
Aa
White text reads best on this color (5.73:1).
About this color
#B53B40 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.158 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.016 away. White text reads best on it, at 5.73:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #B53B40 |
| RGB | rgb(181, 59, 64) |
| HSL | hsl(358, 51%, 47%) |
| OKLCH | oklch(53% 0.158 22.1) |
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 #B53B40 | 5.73:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #B53B40 | 3.66:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #B53B40 text on white | 5.73:1 | AA | Lc 77.7 | Fine for body text |
| #B53B40 text on black | 3.66:1 | AA large text | Lc -24.1 | 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 600.
-
Step 50
50
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CD
oklch(88.5% 0.039 23.9)
-
Step 300
300
#EBAFAC
oklch(80.9% 0.071 22)
-
Step 400
400
#DE8380
oklch(70.7% 0.113 22.3)
-
Step 500
500
#D36061
oklch(63.1% 0.146 21.6)
-
Step 600
600 (this color)
#B53B40
oklch(53% 0.158 22.1)
-
Step 700
700
#A33439
oklch(49% 0.146 21.9)
-
Step 800
800
#852C2F
oklch(42.7% 0.122 22)
-
Step 900
900
#6B292A
oklch(37.7% 0.095 21.9)
-
Step 950
950
#3F1919
oklch(27% 0.06 21.8)
#B53B40 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) | #5C563F | 0.170 |
| Deuteranopia (no green cones) | #7A703D | 0.158 |
| Tritanopia (no blue cones) | #C61D3E | 0.044 |
| Achromatopsia (no color) | #666666 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B53B40
#B53B40
oklch(53% 0.158 22.1)
- #007B82
#007B82
oklch(53.1% 0.09 201.8)
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 #B53B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.016
- Dusty Red #B9484E ΔE 0.028
- Dark Rose #B5485D ΔE 0.039
- Firebrick #B22222 ΔE 0.042
- Light Burgundy #A8415B ΔE 0.043
- Light Maroon #A24857 ΔE 0.046
- Rusty Red #AF2F0D ΔE 0.047
- Brown #A52A2A ΔE 0.050
Use #B53B40 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.