#C31733
Closest named color: Lipstick Red (#C0022F). oklch(52.4% 0.2 21), rgb(195, 23, 51).
Aa
White text reads best on this color (6.01:1).
About this color
#C31733 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.200 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.014 away. White text reads best on it, at 6.01:1.
| 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 | 6.01:1 |
Values
| HEX | #C31733 |
| RGB | rgb(195, 23, 51) |
| HSL | hsl(350, 79%, 43%) |
| OKLCH | oklch(52.4% 0.2 21) |
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 #C31733 | 6.01:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #C31733 | 3.49:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #C31733 text on white | 6.01:1 | AA | Lc 78.0 | Fine for body text |
| #C31733 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
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CDCB
oklch(88.6% 0.05 21.2)
-
Step 300
300
#F5AAA7
oklch(80.9% 0.089 21.8)
-
Step 400
400
#ED7879
oklch(70.7% 0.145 20.9)
-
Step 500
500
#E34E57
oklch(63% 0.184 20.8)
-
Step 600
600 (this color)
#C31733
oklch(52.4% 0.2 21)
-
Step 700
700
#B2162E
oklch(49.1% 0.186 21.1)
-
Step 800
800
#911827
oklch(42.8% 0.155 21.1)
-
Step 900
900
#741D24
oklch(37.6% 0.12 20.9)
-
Step 950
950
#441316
oklch(26.9% 0.075 20.3)
#C31733 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) | #524C32 | 0.223 |
| Deuteranopia (no green cones) | #7C6F2D | 0.200 |
| Tritanopia (no blue cones) | #D70025 | 0.041 |
| Achromatopsia (no color) | #636363 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C31733
#C31733
oklch(52.4% 0.2 21)
- #00797F
#00797F
oklch(52.4% 0.089 200.9)
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 #C31733, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.014
- Cherry #CF0234 ΔE 0.024
- Rose Red #BE013C ΔE 0.024
- Scarlet #BE0119 ΔE 0.027
- Ruby #CA0147 ΔE 0.032
- Firebrick #B22222 ΔE 0.039
- Dull Red #BB3F3F ΔE 0.046
- Lipstick #D5174E ΔE 0.049
Use #C31733 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.