#BB373F
Closest named color: Dull Red (#BB3F3F). oklch(53.6% 0.168 21.7), rgb(187, 55, 63).
Aa
White text reads best on this color (5.62:1).
About this color
#BB373F is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.168 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.014 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.168) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #BB373F |
| RGB | rgb(187, 55, 63) |
| HSL | hsl(356, 55%, 47%) |
| OKLCH | oklch(53.6% 0.168 21.7) |
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 #BB373F | 5.62:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #BB373F | 3.73:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #BB373F text on white | 5.62:1 | AA | Lc 77.0 | Fine for body text |
| #BB373F text on black | 3.73:1 | AA large text | Lc -24.7 | 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 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
#F4CFCD
oklch(88.5% 0.042 21.6)
-
Step 300
300
#EEAEAB
oklch(81% 0.076 21.9)
-
Step 400
400
#E2807F
oklch(70.6% 0.121 21.2)
-
Step 500
500
#D75C5E
oklch(63.1% 0.155 21.7)
-
Step 600
600 (this color)
#BB373F
oklch(53.6% 0.168 21.7)
-
Step 700
700
#A72F36
oklch(49.1% 0.156 22)
-
Step 800
800
#88282D
oklch(42.7% 0.13 21.8)
-
Step 900
900
#6D2729
oklch(37.7% 0.1 21.6)
-
Step 950
950
#401818
oklch(27% 0.063 22.2)
#BB373F 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) | #5B553E | 0.183 |
| Deuteranopia (no green cones) | #7D723B | 0.168 |
| Tritanopia (no blue cones) | #CD0D3B | 0.045 |
| Achromatopsia (no color) | #676767 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB373F
#BB373F
oklch(53.6% 0.168 21.7)
- #007D84
#007D84
oklch(53.7% 0.091 201.7)
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 #BB373F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.014
- Dusty Red #B9484E ΔE 0.030
- Dark Rose #B5485D ΔE 0.042
- Firebrick #B22222 ΔE 0.043
- Lipstick Red #C0022F ΔE 0.044
- Rose Red #BE013C ΔE 0.048
- Cherry #CF0234 ΔE 0.049
- Scarlet #BE0119 ΔE 0.050
Use #BB373F 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.