#B7303C
Closest named color: Dull Red (#BB3F3F). oklch(52.1% 0.171 20.8), rgb(183, 48, 60).
Aa
White text reads best on this color (5.99:1).
About this color
#B7303C is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.171 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.027 away. White text reads best on it, at 5.99:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #B7303C |
| RGB | rgb(183, 48, 60) |
| HSL | hsl(355, 58%, 45%) |
| OKLCH | oklch(52.1% 0.171 20.8) |
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 #B7303C | 5.99:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #B7303C | 3.50:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #B7303C text on white | 5.99:1 | AA | Lc 78.7 | Fine for body text |
| #B7303C text on black | 3.50:1 | AA large text | Lc -23.1 | 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 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
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F2ACAA
oklch(81% 0.083 20.9)
-
Step 400
400
#E77C7D
oklch(70.6% 0.132 20.4)
-
Step 500
500
#DD565C
oklch(63.1% 0.169 20.7)
-
Step 600
600
#C83442
oklch(55.6% 0.184 20.7)
-
Step 700
700 (this color)
#B7303C
oklch(52.1% 0.171 20.8)
-
Step 800
800
#8C212B
oklch(42.6% 0.142 20.8)
-
Step 900
900
#712227
oklch(37.7% 0.111 20.7)
-
Step 950
950
#421517
oklch(26.8% 0.07 20.5)
#B7303C 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) | #56513B | 0.188 |
| Deuteranopia (no green cones) | #786E38 | 0.173 |
| Tritanopia (no blue cones) | #C90036 | 0.043 |
| Achromatopsia (no color) | #636363 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B7303C
#B7303C
oklch(52.1% 0.171 20.8)
- #00787E
#00787E
oklch(52.1% 0.089 200.9)
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 #B7303C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.027
- Firebrick #B22222 ΔE 0.032
- Lipstick Red #C0022F ΔE 0.035
- Rose Red #BE013C ΔE 0.038
- Scarlet #BE0119 ΔE 0.041
- Dusty Red #B9484E ΔE 0.042
- Brown #A52A2A ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.045
Use #B7303C 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.