#BB372F
Closest named color: Dull Red (#BB3F3F). oklch(53.3% 0.17 27.9), rgb(187, 55, 47).
Aa
White text reads best on this color (5.67:1).
About this color
#BB372F is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.170 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.67:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.70:1 |
| White text | 5.67:1 |
Values
| HEX | #BB372F |
| RGB | rgb(187, 55, 47) |
| HSL | hsl(3, 60%, 46%) |
| OKLCH | oklch(53.3% 0.17 27.9) |
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 #BB372F | 5.67:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #BB372F | 3.70:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #BB372F text on white | 5.67:1 | AA | Lc 77.2 | Fine for body text |
| #BB372F text on black | 3.70:1 | AA large text | Lc -24.5 | 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
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F4CFCA
oklch(88.5% 0.042 27)
-
Step 300
300
#EEAEA5
oklch(80.8% 0.077 27.9)
-
Step 400
400
#E38175
oklch(70.7% 0.123 27.9)
-
Step 500
500
#D85D52
oklch(63.1% 0.157 27.5)
-
Step 600
600 (this color)
#BB372F
oklch(53.3% 0.17 27.9)
-
Step 700
700
#A82F28
oklch(49.1% 0.159 27.9)
-
Step 800
800
#882923
oklch(42.6% 0.13 27.6)
-
Step 900
900
#6E2721
oklch(37.7% 0.102 27.8)
-
Step 950
950
#411814
oklch(27.1% 0.065 27.8)
#BB372F 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) | #5D552D | 0.182 |
| Deuteranopia (no green cones) | #7E712A | 0.165 |
| Tritanopia (no blue cones) | #CE0336 | 0.053 |
| Achromatopsia (no color) | #676767 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB372F
#BB372F
oklch(53.3% 0.17 27.9)
- #007B88
#007B88
oklch(53.3% 0.092 207.7)
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 #BB372F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Sinopia #BB3E03 ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.038
- Firebrick #B22222 ΔE 0.038
- Dusty Red #B9484E ΔE 0.039
- Scarlet #BE0119 ΔE 0.045
- Lipstick Red #C0022F ΔE 0.047
- Rufous #AE2012 ΔE 0.048
Use #BB372F 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.