#B53538
Closest named color: Dull Red (#BB3F3F). oklch(52.2% 0.164 23.7), rgb(181, 53, 56).
Aa
White text reads best on this color (5.94:1).
About this color
#B53538 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.164 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.023 away. White text reads best on it, at 5.94:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #B53538 |
| RGB | rgb(181, 53, 56) |
| HSL | hsl(359, 55%, 46%) |
| OKLCH | oklch(52.2% 0.164 23.7) |
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 #B53538 | 5.94:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #B53538 | 3.53:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #B53538 text on white | 5.94:1 | AA | Lc 78.6 | Fine for body text |
| #B53538 text on black | 3.53:1 | AA large text | Lc -23.2 | 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
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F5CECB
oklch(88.4% 0.044 23.2)
-
Step 300
300
#F0ADA8
oklch(80.9% 0.08 23.8)
-
Step 400
400
#E57F7A
oklch(70.8% 0.127 23.7)
-
Step 500
500
#DA5958
oklch(63% 0.163 23.4)
-
Step 600
600
#C63A3D
oklch(55.7% 0.177 23.9)
-
Step 700
700 (this color)
#B53538
oklch(52.2% 0.164 23.7)
-
Step 800
800
#8A2528
oklch(42.6% 0.136 23.6)
-
Step 900
900
#6F2525
oklch(37.7% 0.105 23.6)
-
Step 950
950
#421716
oklch(27.1% 0.067 23.9)
#B53538 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) | #595237 | 0.177 |
| Deuteranopia (no green cones) | #796E34 | 0.164 |
| Tritanopia (no blue cones) | #C70937 | 0.047 |
| Achromatopsia (no color) | #646464 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B53538
#B53538
oklch(52.2% 0.164 23.7)
- #007881
#007881
oklch(52.2% 0.089 204)
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 #B53538, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.023
- Firebrick #B22222 ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.038
- Dusty Red #B9484E ΔE 0.039
- Brown #A52A2A ΔE 0.042
- Lipstick Red #C0022F ΔE 0.043
- Rufous #AE2012 ΔE 0.043
- Scarlet #BE0119 ΔE 0.044
Use #B53538 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.