#BB351F
Closest named color: Sinopia (#BB3E03). oklch(52.9% 0.174 32), rgb(187, 53, 31).
Aa
White text reads best on this color (5.76:1).
About this color
#BB351F is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.174 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.023 away. White text reads best on it, at 5.76:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #BB351F |
| RGB | rgb(187, 53, 31) |
| HSL | hsl(8, 72%, 43%) |
| OKLCH | oklch(52.9% 0.174 32) |
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 #BB351F | 5.76:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #BB351F | 3.64:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #BB351F text on white | 5.76:1 | AA | Lc 77.6 | Fine for body text |
| #BB351F text on black | 3.64:1 | 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
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#EFAEA1
oklch(80.8% 0.079 31.6)
-
Step 400
400
#E4816E
oklch(70.7% 0.126 31.9)
-
Step 500
500
#D95D47
oklch(63.1% 0.161 32)
-
Step 600
600 (this color)
#BB351F
oklch(52.9% 0.174 32)
-
Step 700
700
#A92F1B
oklch(49.1% 0.162 32)
-
Step 800
800
#892919
oklch(42.7% 0.133 32)
-
Step 900
900
#6E271B
oklch(37.6% 0.104 31.8)
-
Step 950
950
#411810
oklch(27% 0.066 32.7)
#BB351F 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) | #5D531B | 0.184 |
| Deuteranopia (no green cones) | #7E7118 | 0.168 |
| Tritanopia (no blue cones) | #CE0031 | 0.057 |
| Achromatopsia (no color) | #666666 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB351F
#BB351F
oklch(52.9% 0.174 32)
- #00798A
#00798A
oklch(52.9% 0.092 211.7)
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 #BB351F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.023
- Rusty Red #AF2F0D ΔE 0.030
- Dull Red #BB3F3F ΔE 0.031
- Firebrick #B22222 ΔE 0.037
- Rufous #AE2012 ΔE 0.043
- Scarlet #BE0119 ΔE 0.044
- Brick Orange #C14A09 ΔE 0.046
- Rust Red #AA2704 ΔE 0.046
Use #BB351F 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.