#BB4521
Closest named color: Sinopia (#BB3E03). oklch(54.8% 0.16 36.9), rgb(187, 69, 33).
Aa
White text reads best on this color (5.26:1).
About this color
#BB4521 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.160 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.016 away. White text reads best on it, at 5.26:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #BB4521 |
| RGB | rgb(187, 69, 33) |
| HSL | hsl(14, 70%, 43%) |
| OKLCH | oklch(54.8% 0.16 36.9) |
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 #BB4521 | 5.26:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #BB4521 | 3.98:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #BB4521 text on white | 5.26:1 | AA | Lc 75.3 | Fine for body text |
| #BB4521 text on black | 3.98:1 | AA large text | Lc -26.5 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E5E0
oklch(93.5% 0.021 36)
-
Step 200
200
#F2D1C7
oklch(88.6% 0.04 37.5)
-
Step 300
300
#EBB1A0
oklch(80.9% 0.072 37)
-
Step 400
400
#DE866C
oklch(70.7% 0.115 37.3)
-
Step 500
500
#D26444
oklch(63% 0.147 37)
-
Step 600
600 (this color)
#BB4521
oklch(54.8% 0.16 36.9)
-
Step 700
700
#A33816
oklch(49.1% 0.148 37)
-
Step 800
800
#852F16
oklch(42.7% 0.124 36.5)
-
Step 900
900
#6B2B19
oklch(37.7% 0.096 36.5)
-
Step 950
950
#3F1A10
oklch(27% 0.061 36.1)
#BB4521 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) | #675B1B | 0.161 |
| Deuteranopia (no green cones) | #84761C | 0.147 |
| Tritanopia (no blue cones) | #CE253E | 0.067 |
| Achromatopsia (no color) | #6C6C6C | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB4521
#BB4521
oklch(54.8% 0.16 36.9)
- #007E96
#007E96
oklch(54.7% 0.098 217.3)
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 #BB4521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.016
- Brick Orange #C14A09 ΔE 0.022
- Burnt Orange #C04E01 ΔE 0.029
- Burnt Siena #B75203 ΔE 0.034
- Dull Red #BB3F3F ΔE 0.036
- Cinnamon #AC4F06 ΔE 0.039
- Rust Orange #C45508 ΔE 0.044
- Dusty Red #B9484E ΔE 0.047
Use #BB4521 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.