#C51D33
Closest named color: Lipstick Red (#C0022F). oklch(53.1% 0.199 21.8), rgb(197, 29, 51).
Aa
White text reads best on this color (5.83:1).
About this color
#C51D33 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.199 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.021 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.199) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #C51D33 |
| RGB | rgb(197, 29, 51) |
| HSL | hsl(352, 74%, 44%) |
| OKLCH | oklch(53.1% 0.199 21.8) |
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 #C51D33 | 5.83:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #C51D33 | 3.59:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #C51D33 text on white | 5.83:1 | AA | Lc 77.3 | Fine for body text |
| #C51D33 text on black | 3.59:1 | 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
#FBE4E2
oklch(93.7% 0.025 23.6)
-
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
#EC7978
oklch(70.7% 0.142 21.8)
-
Step 500
500
#E34F55
oklch(63.1% 0.184 21.8)
-
Step 600
600 (this color)
#C51D33
oklch(53.1% 0.199 21.8)
-
Step 700
700
#B2182D
oklch(49.2% 0.185 21.7)
-
Step 800
800
#901926
oklch(42.6% 0.153 21.7)
-
Step 900
900
#741E23
oklch(37.7% 0.119 21.9)
-
Step 950
950
#441315
oklch(26.9% 0.076 21.4)
#C51D33 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) | #554E32 | 0.220 |
| Deuteranopia (no green cones) | #7E712D | 0.199 |
| Tritanopia (no blue cones) | #D90028 | 0.039 |
| Achromatopsia (no color) | #656565 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C51D33
#C51D33
oklch(53.1% 0.199 21.8)
- #007B82
#007B82
oklch(53.1% 0.09 201.8)
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 #C51D33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.021
- Cherry #CF0234 ΔE 0.021
- Rose Red #BE013C ΔE 0.030
- Scarlet #BE0119 ΔE 0.031
- Ruby #CA0147 ΔE 0.033
- Dull Red #BB3F3F ΔE 0.042
- Firebrick #B22222 ΔE 0.042
- Lipstick #D5174E ΔE 0.046
Use #C51D33 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.