#C31737
Closest named color: Lipstick Red (#C0022F). oklch(52.5% 0.2 19.7), rgb(195, 23, 55).
Aa
White text reads best on this color (6.00:1).
About this color
#C31737 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.200 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.015 away. White text reads best on it, at 6.00:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.200) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #C31737 |
| RGB | rgb(195, 23, 55) |
| HSL | hsl(349, 79%, 43%) |
| OKLCH | oklch(52.5% 0.2 19.7) |
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 #C31737 | 6.00:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #C31737 | 3.49:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #C31737 text on white | 6.00:1 | AA | Lc 77.9 | Fine for body text |
| #C31737 text on black | 3.49:1 | AA large text | Lc -23.8 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E3
oklch(93.5% 0.026 17.6)
-
Step 200
200
#F9CDCC
oklch(88.6% 0.05 19.7)
-
Step 300
300
#F5A9A9
oklch(80.8% 0.09 19.2)
-
Step 400
400
#ED787B
oklch(70.8% 0.144 19.8)
-
Step 500
500
#E34E5A
oklch(63.1% 0.184 19.6)
-
Step 600
600 (this color)
#C31737
oklch(52.5% 0.2 19.7)
-
Step 700
700
#B21532
oklch(49.1% 0.186 19.6)
-
Step 800
800
#90182A
oklch(42.6% 0.153 19.6)
-
Step 900
900
#741D26
oklch(37.7% 0.12 19.6)
-
Step 950
950
#441317
oklch(26.9% 0.075 19)
#C31737 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) | #524C37 | 0.222 |
| Deuteranopia (no green cones) | #7B6F31 | 0.202 |
| Tritanopia (no blue cones) | #D70027 | 0.041 |
| Achromatopsia (no color) | #636363 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C31737
#C31737
oklch(52.5% 0.2 19.7)
- #00797E
#00797E
oklch(52.4% 0.089 199.9)
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 #C31737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.015
- Rose Red #BE013C ΔE 0.021
- Cherry #CF0234 ΔE 0.023
- Ruby #CA0147 ΔE 0.028
- Scarlet #BE0119 ΔE 0.030
- Firebrick #B22222 ΔE 0.042
- Lipstick #D5174E ΔE 0.046
- Dull Red #BB3F3F ΔE 0.046
Use #C31737 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.