#BB3927
Closest named color: Dull Red (#BB3F3F). oklch(53.4% 0.17 31), rgb(187, 57, 39).
Aa
White text reads best on this color (5.63:1).
About this color
#BB3927 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.170 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.024 away. White text reads best on it, at 5.63:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #BB3927 |
| RGB | rgb(187, 57, 39) |
| HSL | hsl(7, 65%, 44%) |
| OKLCH | oklch(53.4% 0.17 31) |
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 #BB3927 | 5.63:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #BB3927 | 3.72:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #BB3927 text on white | 5.63:1 | AA | Lc 77.0 | Fine for body text |
| #BB3927 text on black | 3.72:1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C8
oklch(88.6% 0.042 32.6)
-
Step 300
300
#EEAFA3
oklch(81% 0.076 31)
-
Step 400
400
#E28271
oklch(70.7% 0.122 31)
-
Step 500
500
#D75F4B
oklch(63.1% 0.155 31.4)
-
Step 600
600 (this color)
#BB3927
oklch(53.4% 0.17 31)
-
Step 700
700
#A83121
oklch(49.2% 0.158 30.9)
-
Step 800
800
#882A1D
oklch(42.7% 0.131 30.9)
-
Step 900
900
#6E281D
oklch(37.8% 0.102 31.2)
-
Step 950
950
#401812
oklch(26.9% 0.064 30.5)
#BB3927 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) | #5F5524 | 0.178 |
| Deuteranopia (no green cones) | #7F7221 | 0.164 |
| Tritanopia (no blue cones) | #CE0736 | 0.058 |
| Achromatopsia (no color) | #676767 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB3927
#BB3927
oklch(53.4% 0.17 31)
- #007B8B
#007B8B
oklch(53.4% 0.093 210.6)
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 #BB3927, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.024
- Sinopia #BB3E03 ΔE 0.024
- Rusty Red #AF2F0D ΔE 0.035
- Firebrick #B22222 ΔE 0.041
- Dusty Red #B9484E ΔE 0.043
- Brick Orange #C14A09 ΔE 0.043
- Scarlet #BE0119 ΔE 0.049
- Rufous #AE2012 ΔE 0.049
Use #BB3927 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.