#B63F45
Closest named color: Dull Red (#BB3F3F). oklch(53.7% 0.154 21.1), rgb(182, 63, 69).
Aa
White text reads best on this color (5.54:1).
About this color
#B63F45 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.154 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.013 away. White text reads best on it, at 5.54:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.154) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #B63F45 |
| RGB | rgb(182, 63, 69) |
| HSL | hsl(357, 49%, 48%) |
| OKLCH | oklch(53.7% 0.154 21.1) |
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 #B63F45 | 5.54:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #B63F45 | 3.78:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #B63F45 text on white | 5.54:1 | AA | Lc 76.8 | Fine for body text |
| #B63F45 text on black | 3.78:1 | AA large text | Lc -24.9 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CE
oklch(88.6% 0.038 21.9)
-
Step 300
300
#EAAFAD
oklch(80.8% 0.069 20.9)
-
Step 400
400
#DD8482
oklch(70.7% 0.11 21.6)
-
Step 500
500
#D16263
oklch(63.1% 0.141 21.4)
-
Step 600
600 (this color)
#B63F45
oklch(53.7% 0.154 21.1)
-
Step 700
700
#A2363B
oklch(49.1% 0.143 21.5)
-
Step 800
800
#842E31
oklch(42.8% 0.118 21.6)
-
Step 900
900
#6A2A2B
oklch(37.7% 0.092 21.6)
-
Step 950
950
#3E191A
oklch(26.9% 0.058 20.1)
#B63F45 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) | #5E5844 | 0.166 |
| Deuteranopia (no green cones) | #7C7242 | 0.154 |
| Tritanopia (no blue cones) | #C72542 | 0.042 |
| Achromatopsia (no color) | #686868 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63F45
#B63F45
oklch(53.7% 0.154 21.1)
- #007D84
#007D84
oklch(53.7% 0.091 201.7)
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 #B63F45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.013
- Dusty Red #B9484E ΔE 0.020
- Dark Rose #B5485D ΔE 0.032
- Light Burgundy #A8415B ΔE 0.041
- Light Maroon #A24857 ΔE 0.043
- Firebrick #B22222 ΔE 0.051
- Sinopia #BB3E03 ΔE 0.053
- Rusty Red #AF2F0D ΔE 0.055
Use #B63F45 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.