#B63C33
Closest named color: Dull Red (#BB3F3F). oklch(53.1% 0.159 28), rgb(182, 60, 51).
Aa
White text reads best on this color (5.70:1).
About this color
#B63C33 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.159 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.017 away. White text reads best on it, at 5.70:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.159) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.68:1 |
| White text | 5.70:1 |
Values
| HEX | #B63C33 |
| RGB | rgb(182, 60, 51) |
| HSL | hsl(4, 56%, 46%) |
| OKLCH | oklch(53.1% 0.159 28) |
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 #B63C33 | 5.70:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #B63C33 | 3.68:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #B63C33 text on white | 5.70:1 | AA | Lc 77.5 | Fine for body text |
| #B63C33 text on black | 3.68:1 | AA large text | Lc -24.2 | 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
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F3D0CB
oklch(88.6% 0.04 27.5)
-
Step 300
300
#ECB0A7
oklch(81% 0.072 28.4)
-
Step 400
400
#DF8478
oklch(70.8% 0.114 28.3)
-
Step 500
500
#D36155
oklch(63% 0.147 28)
-
Step 600
600 (this color)
#B63C33
oklch(53.1% 0.159 28)
-
Step 700
700
#A4352D
oklch(49.1% 0.148 27.9)
-
Step 800
800
#852D26
oklch(42.6% 0.122 27.9)
-
Step 900
900
#6B2A23
oklch(37.7% 0.095 28.5)
-
Step 950
950
#3F1915
oklch(26.9% 0.06 27.9)
#B63C33 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) | #5E5631 | 0.169 |
| Deuteranopia (no green cones) | #7C702F | 0.155 |
| Tritanopia (no blue cones) | #C81A3B | 0.052 |
| Achromatopsia (no color) | #666666 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63C33
#B63C33
oklch(53.1% 0.159 28)
- #007A87
#007A87
oklch(53% 0.091 207.8)
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 #B63C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.017
- Sinopia #BB3E03 ΔE 0.035
- Dusty Red #B9484E ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.037
- Firebrick #B22222 ΔE 0.040
- Rufous #AE2012 ΔE 0.049
- Brick #A03623 ΔE 0.050
- Brown #A52A2A ΔE 0.050
Use #B63C33 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.