#BB4531
Closest named color: Dull Red (#BB3F3F). oklch(55% 0.156 31.9), rgb(187, 69, 49).
Aa
White text reads best on this color (5.23:1).
About this color
#BB4531 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.156 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.23:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.156) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.00:1 |
| White text | 5.23:1 |
Values
| HEX | #BB4531 |
| RGB | rgb(187, 69, 49) |
| HSL | hsl(9, 58%, 46%) |
| OKLCH | oklch(55% 0.156 31.9) |
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 #BB4531 | 5.23:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #BB4531 | 4.00:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #BB4531 text on white | 5.23:1 | AA | Lc 75.1 | Fine for body text |
| #BB4531 text on black | 4.00:1 | AA large text | Lc -26.6 | 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
#F7E5E1
oklch(93.5% 0.021 32.5)
-
Step 200
200
#F2D0C9
oklch(88.4% 0.04 31.6)
-
Step 300
300
#EAB0A4
oklch(80.8% 0.07 31.9)
-
Step 400
400
#DE8574
oklch(70.7% 0.113 31.6)
-
Step 500
500
#D2634F
oklch(63% 0.145 31.8)
-
Step 600
600 (this color)
#BB4531
oklch(55% 0.156 31.9)
-
Step 700
700
#A33726
oklch(49.1% 0.146 31.6)
-
Step 800
800
#842F21
oklch(42.7% 0.12 31.7)
-
Step 900
900
#6B2B20
oklch(37.8% 0.094 31.7)
-
Step 950
950
#3F1A13
oklch(27.1% 0.06 32.2)
#BB4531 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) | #665C2E | 0.161 |
| Deuteranopia (no green cones) | #83762D | 0.149 |
| Tritanopia (no blue cones) | #CE2841 | 0.058 |
| Achromatopsia (no color) | #6C6C6C | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB4531
#BB4531
oklch(55% 0.156 31.9)
- #008092
#008092
oklch(55% 0.096 211.8)
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 #BB4531, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Sinopia #BB3E03 ΔE 0.027
- Brick Orange #C14A09 ΔE 0.033
- Dusty Red #B9484E ΔE 0.033
- Burnt Orange #C04E01 ΔE 0.040
- Burnt Siena #B75203 ΔE 0.045
- Cinnamon #AC4F06 ΔE 0.049
- Rusty Red #AF2F0D ΔE 0.051
Use #BB4531 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.