#B33B2D
Closest named color: Dull Red (#BB3F3F). oklch(52.4% 0.158 29.9), rgb(179, 59, 45).
Aa
White text reads best on this color (5.86:1).
About this color
#B33B2D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.158 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.026 away. White text reads best on it, at 5.86:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #B33B2D |
| RGB | rgb(179, 59, 45) |
| HSL | hsl(6, 60%, 44%) |
| OKLCH | oklch(52.4% 0.158 29.9) |
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 #B33B2D | 5.86:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #B33B2D | 3.58:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #B33B2D text on white | 5.86:1 | AA | Lc 78.3 | Fine for body text |
| #B33B2D text on black | 3.58:1 | AA large text | Lc -23.4 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EBB0A6
oklch(80.9% 0.071 29.6)
-
Step 400
400
#DE8476
oklch(70.6% 0.114 29.6)
-
Step 500
500
#D36252
oklch(63.1% 0.146 29.9)
-
Step 600
600 (this color)
#B33B2D
oklch(52.4% 0.158 29.9)
-
Step 700
700
#A43629
oklch(49.2% 0.147 29.9)
-
Step 800
800
#852E23
oklch(42.7% 0.122 30.1)
-
Step 900
900
#6B2A21
oklch(37.7% 0.095 30.1)
-
Step 950
950
#3F1914
oklch(26.9% 0.061 29.3)
#B33B2D 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) | #5D542B | 0.166 |
| Deuteranopia (no green cones) | #7B6E29 | 0.151 |
| Tritanopia (no blue cones) | #C51839 | 0.054 |
| Achromatopsia (no color) | #656565 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B33B2D
#B33B2D
oklch(52.4% 0.158 29.9)
- #007887
#007887
oklch(52.5% 0.091 209.9)
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 #B33B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.026
- Rusty Red #AF2F0D ΔE 0.029
- Sinopia #BB3E03 ΔE 0.032
- Firebrick #B22222 ΔE 0.036
- Brick #A03623 ΔE 0.042
- Dusty Red #B9484E ΔE 0.042
- Rufous #AE2012 ΔE 0.043
- Rust Red #AA2704 ΔE 0.043
Use #B33B2D 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.