#C31F43
Closest named color: Ruby (#CA0147). oklch(53.1% 0.195 16.2), rgb(195, 31, 67).
Aa
White text reads best on this color (5.83:1).
About this color
#C31F43 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.195 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Ruby (#CA0147), ΔE 0.021 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.195) |
| Temperature | warm |
| Nearest name | Ruby (#CA0147) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #C31F43 |
| RGB | rgb(195, 31, 67) |
| HSL | hsl(347, 73%, 44%) |
| OKLCH | oklch(53.1% 0.195 16.2) |
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 #C31F43 | 5.83:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #C31F43 | 3.59:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #C31F43 text on white | 5.83:1 | AA | Lc 77.4 | Fine for body text |
| #C31F43 text on black | 3.59:1 | AA large text | Lc -24.4 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FBE3E4
oklch(93.6% 0.026 14.7)
-
Step 200
200
#F8CDCE
oklch(88.6% 0.049 16.5)
-
Step 300
300
#F4AAAD
oklch(81% 0.087 16.5)
-
Step 400
400
#EB7982
oklch(70.8% 0.141 16.4)
-
Step 500
500
#E15063
oklch(63.2% 0.18 16.3)
-
Step 600
600 (this color)
#C31F43
oklch(53.1% 0.195 16.2)
-
Step 700
700
#B01A3B
oklch(49.2% 0.182 16.4)
-
Step 800
800
#8F1A31
oklch(42.7% 0.151 16.3)
-
Step 900
900
#731E2B
oklch(37.7% 0.118 16.3)
-
Step 950
950
#44141A
oklch(27.1% 0.074 16.1)
#C31F43 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) | #534F43 | 0.217 |
| Deuteranopia (no green cones) | #7B713E | 0.199 |
| Tritanopia (no blue cones) | #D60030 | 0.041 |
| Achromatopsia (no color) | #656565 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C31F43
#C31F43
oklch(53.1% 0.195 16.2)
- #007C7D
#007C7D
oklch(53.1% 0.091 195.8)
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 #C31F43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ruby #CA0147 ΔE 0.021
- Rose Red #BE013C ΔE 0.023
- Lipstick Red #C0022F ΔE 0.027
- Cherry #CF0234 ΔE 0.028
- Lipstick #D5174E ΔE 0.038
- Scarlet #BE0119 ΔE 0.044
- Dull Red #BB3F3F ΔE 0.045
- Crimson #DC143C ΔE 0.050
Use #C31F43 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.