#B63A34
Closest named color: Dull Red (#BB3F3F). oklch(52.8% 0.161 26.9), rgb(182, 58, 52).
Aa
White text reads best on this color (5.76:1).
About this color
#B63A34 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.161 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.76:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #B63A34 |
| RGB | rgb(182, 58, 52) |
| HSL | hsl(3, 56%, 46%) |
| OKLCH | oklch(52.8% 0.161 26.9) |
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 #B63A34 | 5.76:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #B63A34 | 3.64:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #B63A34 text on white | 5.76:1 | AA | Lc 77.8 | Fine for body text |
| #B63A34 text on black | 3.64:1 | AA large text | Lc -24.0 | 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
#ECAFA8
oklch(80.9% 0.073 26.2)
-
Step 400
400
#E08379
oklch(70.7% 0.116 26.9)
-
Step 500
500
#D46057
oklch(63% 0.148 26.6)
-
Step 600
600 (this color)
#B63A34
oklch(52.8% 0.161 26.9)
-
Step 700
700
#A5342E
oklch(49.2% 0.15 27.1)
-
Step 800
800
#862C27
oklch(42.7% 0.124 26.9)
-
Step 900
900
#6C2924
oklch(37.7% 0.097 27)
-
Step 950
950
#3F1916
oklch(27% 0.06 26.4)
#B63A34 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) | #5D5532 | 0.171 |
| Deuteranopia (no green cones) | #7C7030 | 0.158 |
| Tritanopia (no blue cones) | #C8163A | 0.050 |
| Achromatopsia (no color) | #666666 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63A34
#B63A34
oklch(52.8% 0.161 26.9)
- #007A86
#007A86
oklch(53% 0.091 206.8)
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 #B63A34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Dusty Red #B9484E ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.036
- Firebrick #B22222 ΔE 0.037
- Sinopia #BB3E03 ΔE 0.038
- Rufous #AE2012 ΔE 0.047
- Brown #A52A2A ΔE 0.048
- Brick #A03623 ΔE 0.050
Use #B63A34 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.