#C51931
Closest named color: Lipstick Red (#C0022F). oklch(52.9% 0.201 22), rgb(197, 25, 49).
Aa
White text reads best on this color (5.90:1).
About this color
#C51931 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.201 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.019 away. White text reads best on it, at 5.90:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.201) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #C51931 |
| RGB | rgb(197, 25, 49) |
| HSL | hsl(352, 77%, 44%) |
| OKLCH | oklch(52.9% 0.201 22) |
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 #C51931 | 5.90:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #C51931 | 3.55:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #C51931 text on white | 5.90:1 | AA | Lc 77.5 | Fine for body text |
| #C51931 text on black | 3.55:1 | AA large text | Lc -24.3 | 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
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F6AAA6
oklch(81% 0.09 22.6)
-
Step 400
400
#ED7877
oklch(70.7% 0.145 21.9)
-
Step 500
500
#E34E54
oklch(63% 0.185 21.9)
-
Step 600
600 (this color)
#C51931
oklch(52.9% 0.201 22)
-
Step 700
700
#B2152B
oklch(49% 0.187 22.1)
-
Step 800
800
#911825
oklch(42.7% 0.155 22)
-
Step 900
900
#741D23
oklch(37.6% 0.12 21.5)
-
Step 950
950
#451315
oklch(27.1% 0.077 21.6)
#C51931 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) | #544D30 | 0.222 |
| Deuteranopia (no green cones) | #7D712A | 0.203 |
| Tritanopia (no blue cones) | #D90025 | 0.040 |
| Achromatopsia (no color) | #646464 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C51931
#C51931
oklch(52.9% 0.201 22)
- #007A82
#007A82
oklch(52.8% 0.09 202.8)
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 #C51931, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.019
- Cherry #CF0234 ΔE 0.021
- Scarlet #BE0119 ΔE 0.028
- Rose Red #BE013C ΔE 0.029
- Ruby #CA0147 ΔE 0.033
- Firebrick #B22222 ΔE 0.042
- Dull Red #BB3F3F ΔE 0.044
- Lipstick #D5174E ΔE 0.047
Use #C51931 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.