#B7373D
Closest named color: Dull Red (#BB3F3F). oklch(52.8% 0.164 22.3), rgb(183, 55, 61).
Aa
White text reads best on this color (5.78:1).
About this color
#B7373D is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.164 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.017 away. White text reads best on it, at 5.78:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #B7373D |
| RGB | rgb(183, 55, 61) |
| HSL | hsl(357, 54%, 47%) |
| OKLCH | oklch(52.8% 0.164 22.3) |
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 #B7373D | 5.78:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #B7373D | 3.62:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #B7373D text on white | 5.78:1 | AA | Lc 77.9 | Fine for body text |
| #B7373D text on black | 3.62:1 | AA large text | Lc -23.9 | 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
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F3CFCD
oklch(88.4% 0.041 21.7)
-
Step 300
300
#EDAEAB
oklch(80.9% 0.074 21.9)
-
Step 400
400
#E1817F
oklch(70.7% 0.119 21.8)
-
Step 500
500
#D55E5E
oklch(63% 0.151 22.4)
-
Step 600
600 (this color)
#B7373D
oklch(52.8% 0.164 22.3)
-
Step 700
700
#A63136
oklch(49.1% 0.153 22.5)
-
Step 800
800
#872A2D
oklch(42.7% 0.127 22.5)
-
Step 900
900
#6C2829
oklch(37.7% 0.097 22.1)
-
Step 950
950
#401818
oklch(27% 0.063 22.2)
#B7373D 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) | #5A543C | 0.178 |
| Deuteranopia (no green cones) | #7A7039 | 0.165 |
| Tritanopia (no blue cones) | #C9103A | 0.046 |
| Achromatopsia (no color) | #656565 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B7373D
#B7373D
oklch(52.8% 0.164 22.3)
- #007A82
#007A82
oklch(52.8% 0.09 202.8)
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 #B7373D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.017
- Dusty Red #B9484E ΔE 0.033
- Firebrick #B22222 ΔE 0.038
- Dark Rose #B5485D ΔE 0.044
- Lipstick Red #C0022F ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.045
- Light Burgundy #A8415B ΔE 0.047
- Rose Red #BE013C ΔE 0.048
Use #B7373D 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.