#B33B45
Closest named color: Dull Red (#BB3F3F). oklch(52.7% 0.155 19.5), rgb(179, 59, 69).
Aa
White text reads best on this color (5.78:1).
About this color
#B33B45 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.155 and its hue 20°. 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 5.78:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #B33B45 |
| RGB | rgb(179, 59, 69) |
| HSL | hsl(355, 50%, 47%) |
| OKLCH | oklch(52.7% 0.155 19.5) |
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 #B33B45 | 5.78:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #B33B45 | 3.62:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #B33B45 text on white | 5.78:1 | AA | Lc 78.0 | Fine for body text |
| #B33B45 text on black | 3.62:1 | AA large text | Lc -23.8 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CF
oklch(88.6% 0.038 19.9)
-
Step 300
300
#EAAFAE
oklch(80.8% 0.069 19.8)
-
Step 400
400
#DD8384
oklch(70.6% 0.111 19.5)
-
Step 500
500
#D26166
oklch(63.2% 0.143 19.4)
-
Step 600
600 (this color)
#B33B45
oklch(52.7% 0.155 19.5)
-
Step 700
700
#A2353E
oklch(49.1% 0.144 19.5)
-
Step 800
800
#842D33
oklch(42.7% 0.119 19.8)
-
Step 900
900
#6A292D
oklch(37.6% 0.093 19)
-
Step 950
950
#3F191A
oklch(27.1% 0.06 20.3)
#B33B45 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) | #5A5545 | 0.169 |
| Deuteranopia (no green cones) | #796F42 | 0.155 |
| Tritanopia (no blue cones) | #C4203F | 0.041 |
| Achromatopsia (no color) | #656565 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B33B45
#B33B45
oklch(52.7% 0.155 19.5)
- #007A7F
#007A7F
oklch(52.7% 0.09 199.8)
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 #B33B45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Dusty Red #B9484E ΔE 0.029
- Dark Rose #B5485D ΔE 0.035
- Light Burgundy #A8415B ΔE 0.036
- Light Maroon #A24857 ΔE 0.040
- Firebrick #B22222 ΔE 0.045
- Brown #A52A2A ΔE 0.050
- Rusty Red #AF2F0D ΔE 0.052
Use #B33B45 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.