#BB351B
Closest named color: Sinopia (#BB3E03). oklch(52.9% 0.175 32.9), rgb(187, 53, 27).
Aa
White text reads best on this color (5.77:1).
About this color
#BB351B is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.175 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.021 away. White text reads best on it, at 5.77:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #BB351B |
| RGB | rgb(187, 53, 27) |
| HSL | hsl(10, 75%, 42%) |
| OKLCH | oklch(52.9% 0.175 32.9) |
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 #BB351B | 5.77:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #BB351B | 3.63:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #BB351B text on white | 5.77:1 | AA | Lc 77.6 | Fine for body text |
| #BB351B text on black | 3.63:1 | AA large text | Lc -24.2 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#EFAFA0
oklch(81% 0.079 33.6)
-
Step 400
400
#E4816D
oklch(70.7% 0.126 32.4)
-
Step 500
500
#D95D45
oklch(63.1% 0.161 32.7)
-
Step 600
600 (this color)
#BB351B
oklch(52.9% 0.175 32.9)
-
Step 700
700
#A92F17
oklch(49.1% 0.162 33)
-
Step 800
800
#892916
oklch(42.7% 0.134 33.1)
-
Step 900
900
#6F2719
oklch(37.8% 0.106 32.9)
-
Step 950
950
#411810
oklch(27% 0.066 32.7)
#BB351B 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) | #5E5316 | 0.183 |
| Deuteranopia (no green cones) | #7F7112 | 0.167 |
| Tritanopia (no blue cones) | #CE0031 | 0.058 |
| Achromatopsia (no color) | #666666 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB351B
#BB351B
oklch(52.9% 0.175 32.9)
- #00798B
#00798B
oklch(52.9% 0.092 212.7)
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 #BB351B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.021
- Rusty Red #AF2F0D ΔE 0.029
- Dull Red #BB3F3F ΔE 0.033
- Firebrick #B22222 ΔE 0.038
- Rufous #AE2012 ΔE 0.044
- Brick Orange #C14A09 ΔE 0.044
- Scarlet #BE0119 ΔE 0.045
- Rust Red #AA2704 ΔE 0.045
Use #BB351B 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.