#B33645
Closest named color: Dull Red (#BB3F3F). oklch(52.2% 0.16 18), rgb(179, 54, 69).
Aa
White text reads best on this color (5.94:1).
About this color
#B33645 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.160 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.028 away. White text reads best on it, at 5.94:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #B33645 |
| RGB | rgb(179, 54, 69) |
| HSL | hsl(353, 54%, 46%) |
| OKLCH | oklch(52.2% 0.16 18) |
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 #B33645 | 5.94:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #B33645 | 3.53:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #B33645 text on white | 5.94:1 | AA | Lc 78.7 | Fine for body text |
| #B33645 text on black | 3.53:1 | AA large text | Lc -23.1 | 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 700.
-
Step 50
50
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#EFADAE
oklch(81% 0.078 17.9)
-
Step 400
400
#E37F83
oklch(70.7% 0.123 18.2)
-
Step 500
500
#D85A64
oklch(63.1% 0.158 18.1)
-
Step 600
600
#C33B4B
oklch(55.5% 0.172 18.2)
-
Step 700
700 (this color)
#B33645
oklch(52.2% 0.16 18)
-
Step 800
800
#892632
oklch(42.7% 0.133 18.1)
-
Step 900
900
#6E252C
oklch(37.7% 0.104 18)
-
Step 950
950
#41171A
oklch(27.1% 0.065 18.2)
#B33645 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) | #575345 | 0.176 |
| Deuteranopia (no green cones) | #776D42 | 0.161 |
| Tritanopia (no blue cones) | #C4163C | 0.041 |
| Achromatopsia (no color) | #646464 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B33645
#B33645
oklch(52.2% 0.16 18)
- #00797C
#00797C
oklch(52.3% 0.089 197.8)
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 #B33645, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.028
- Light Burgundy #A8415B ΔE 0.036
- Dusty Red #B9484E ΔE 0.036
- Dark Rose #B5485D ΔE 0.040
- Firebrick #B22222 ΔE 0.041
- Light Maroon #A24857 ΔE 0.043
- Rose Red #BE013C ΔE 0.045
- Lipstick Red #C0022F ΔE 0.046
Use #B33645 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.