#C51C3B
Closest named color: Cherry (#CF0234). oklch(53.2% 0.199 19), rgb(197, 28, 59).
Aa
White text reads best on this color (5.82:1).
About this color
#C51C3B is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.199 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.021 away. White text reads best on it, at 5.82:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.199) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #C51C3B |
| RGB | rgb(197, 28, 59) |
| HSL | hsl(349, 75%, 44%) |
| OKLCH | oklch(53.2% 0.199 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 #C51C3B | 5.82:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #C51C3B | 3.60:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #C51C3B text on white | 5.82:1 | AA | Lc 77.2 | Fine for body text |
| #C51C3B text on black | 3.60:1 | AA large text | Lc -24.5 | 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
#FDF2F2
oklch(97% 0.012 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
#F5AAAA
oklch(81% 0.089 19.2)
-
Step 400
400
#EC787D
oklch(70.7% 0.143 18.7)
-
Step 500
500
#E24F5C
oklch(63.1% 0.182 19)
-
Step 600
600 (this color)
#C51C3B
oklch(53.2% 0.199 19)
-
Step 700
700
#B11634
oklch(49% 0.185 18.8)
-
Step 800
800
#90182B
oklch(42.6% 0.153 19.1)
-
Step 900
900
#741E27
oklch(37.8% 0.119 19.3)
-
Step 950
950
#441317
oklch(26.9% 0.075 19)
#C51C3B 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) | #544F3B | 0.221 |
| Deuteranopia (no green cones) | #7D7136 | 0.200 |
| Tritanopia (no blue cones) | #D9002B | 0.041 |
| Achromatopsia (no color) | #656565 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C51C3B
#C51C3B
oklch(53.2% 0.199 19)
- #007C80
#007C80
oklch(53.2% 0.091 198.8)
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 #C51C3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.021
- Lipstick Red #C0022F ΔE 0.022
- Ruby #CA0147 ΔE 0.025
- Rose Red #BE013C ΔE 0.025
- Scarlet #BE0119 ΔE 0.037
- Lipstick #D5174E ΔE 0.040
- Dull Red #BB3F3F ΔE 0.044
- Crimson #DC143C ΔE 0.046
Use #C51C3B 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.