#B63040
Closest named color: Dull Red (#BB3F3F). oklch(52% 0.17 19), rgb(182, 48, 64).
Aa
White text reads best on this color (6.02:1).
About this color
#B63040 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.170 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.030 away. White text reads best on it, at 6.02:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #B63040 |
| RGB | rgb(182, 48, 64) |
| HSL | hsl(353, 58%, 45%) |
| OKLCH | oklch(52% 0.17 19) |
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 #B63040 | 6.02:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #B63040 | 3.48:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #B63040 text on white | 6.02:1 | AA | Lc 78.9 | Fine for body text |
| #B63040 text on black | 3.48:1 | AA large text | Lc -22.9 | 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 700.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F6CECD
oklch(88.5% 0.045 19.7)
-
Step 300
300
#F1ACAC
oklch(81% 0.081 19)
-
Step 400
400
#E77C80
oklch(70.7% 0.132 18.6)
-
Step 500
500
#DC5660
oklch(63.1% 0.168 18.9)
-
Step 600
600
#C73546
oklch(55.5% 0.182 19.3)
-
Step 700
700 (this color)
#B63040
oklch(52% 0.17 19)
-
Step 800
800
#8C222F
oklch(42.8% 0.141 19)
-
Step 900
900
#702329
oklch(37.7% 0.109 19.6)
-
Step 950
950
#421619
oklch(27.1% 0.068 18.8)
#B63040 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) | #555140 | 0.187 |
| Deuteranopia (no green cones) | #776D3C | 0.171 |
| Tritanopia (no blue cones) | #C80037 | 0.042 |
| Achromatopsia (no color) | #636363 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63040
#B63040
oklch(52% 0.17 19)
- #00787C
#00787C
oklch(52% 0.088 198.9)
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 #B63040, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.030
- Firebrick #B22222 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.036
- Rose Red #BE013C ΔE 0.037
- Dusty Red #B9484E ΔE 0.042
- Scarlet #BE0119 ΔE 0.044
- Light Burgundy #A8415B ΔE 0.045
- Brown #A52A2A ΔE 0.045
Use #B63040 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.