#B5303D
Closest named color: Dull Red (#BB3F3F). oklch(51.8% 0.169 20.2), rgb(181, 48, 61).
Aa
White text reads best on this color (6.07:1).
About this color
#B5303D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.169 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.030 away. White text reads best on it, at 6.07:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #B5303D |
| RGB | rgb(181, 48, 61) |
| HSL | hsl(354, 58%, 45%) |
| OKLCH | oklch(51.8% 0.169 20.2) |
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 #B5303D | 6.07:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #B5303D | 3.45:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #B5303D text on white | 6.07:1 | AA | Lc 79.1 | Fine for body text |
| #B5303D text on black | 3.45:1 | AA large text | Lc -22.7 | 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
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F6CECD
oklch(88.5% 0.045 19.7)
-
Step 300
300
#F1ACAB
oklch(80.9% 0.082 19.9)
-
Step 400
400
#E77D7E
oklch(70.8% 0.131 20.3)
-
Step 500
500
#DC575D
oklch(63.1% 0.167 20.6)
-
Step 600
600
#C73644
oklch(55.6% 0.181 20.3)
-
Step 700
700 (this color)
#B5303D
oklch(51.8% 0.169 20.2)
-
Step 800
800
#8B222D
oklch(42.6% 0.14 20)
-
Step 900
900
#702328
oklch(37.7% 0.109 20.3)
-
Step 950
950
#421618
oklch(27% 0.068 20.2)
#B5303D 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) | #55503C | 0.186 |
| Deuteranopia (no green cones) | #776D39 | 0.170 |
| Tritanopia (no blue cones) | #C70036 | 0.043 |
| Achromatopsia (no color) | #626262 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5303D
#B5303D
oklch(51.8% 0.169 20.2)
- #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 #B5303D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.030
- Firebrick #B22222 ΔE 0.031
- Lipstick Red #C0022F ΔE 0.037
- Rose Red #BE013C ΔE 0.038
- Brown #A52A2A ΔE 0.041
- Scarlet #BE0119 ΔE 0.043
- Dusty Red #B9484E ΔE 0.043
- Rouge #AB1239 ΔE 0.045
Use #B5303D 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.