#B63533
Closest named color: Dull Red (#BB3F3F). oklch(52.3% 0.166 25.7), rgb(182, 53, 51).
Aa
White text reads best on this color (5.92:1).
About this color
#B63533 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.166 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.023 away. White text reads best on it, at 5.92:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #B63533 |
| RGB | rgb(182, 53, 51) |
| HSL | hsl(1, 56%, 46%) |
| OKLCH | oklch(52.3% 0.166 25.7) |
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 #B63533 | 5.92:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #B63533 | 3.54:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #B63533 text on white | 5.92:1 | AA | Lc 78.5 | Fine for body text |
| #B63533 text on black | 3.54:1 | AA large text | Lc -23.3 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F6CFCA
oklch(88.6% 0.045 26.6)
-
Step 300
300
#F0ADA6
oklch(80.9% 0.08 25.7)
-
Step 400
400
#E67F76
oklch(70.8% 0.129 26)
-
Step 500
500
#DB5953
oklch(63.1% 0.165 25.6)
-
Step 600
600
#C63937
oklch(55.5% 0.178 25.8)
-
Step 700
700 (this color)
#B63533
oklch(52.3% 0.166 25.7)
-
Step 800
800
#8B2524
oklch(42.7% 0.138 25.6)
-
Step 900
900
#702522
oklch(37.8% 0.107 25.8)
-
Step 950
950
#421714
oklch(27.1% 0.068 26.5)
#B63533 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) | #5A5231 | 0.178 |
| Deuteranopia (no green cones) | #7A6E2F | 0.163 |
| Tritanopia (no blue cones) | #C80436 | 0.049 |
| Achromatopsia (no color) | #646464 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63533
#B63533
oklch(52.3% 0.166 25.7)
- #007883
#007883
oklch(52.3% 0.089 206)
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 #B63533, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.023
- Firebrick #B22222 ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.034
- Dusty Red #B9484E ΔE 0.041
- Rufous #AE2012 ΔE 0.041
- Sinopia #BB3E03 ΔE 0.042
- Scarlet #BE0119 ΔE 0.043
- Brown #A52A2A ΔE 0.043
Use #B63533 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.