#C51E30
Closest named color: Lipstick Red (#C0022F). oklch(53.1% 0.198 22.9), rgb(197, 30, 48).
Aa
White text reads best on this color (5.82:1).
About this color
#C51E30 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.198 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.022 away. White text reads best on it, at 5.82:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #C51E30 |
| RGB | rgb(197, 30, 48) |
| HSL | hsl(354, 74%, 45%) |
| OKLCH | oklch(53.1% 0.198 22.9) |
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 #C51E30 | 5.82:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #C51E30 | 3.60:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #C51E30 text on white | 5.82:1 | AA | Lc 77.3 | Fine for body text |
| #C51E30 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F5AAA6
oklch(80.9% 0.089 22.6)
-
Step 400
400
#EC7976
oklch(70.7% 0.143 22.9)
-
Step 500
500
#E35053
oklch(63.2% 0.183 22.9)
-
Step 600
600 (this color)
#C51E30
oklch(53.1% 0.198 22.9)
-
Step 700
700
#B2192A
oklch(49.2% 0.185 22.9)
-
Step 800
800
#901A24
oklch(42.7% 0.152 22.8)
-
Step 900
900
#741E22
oklch(37.7% 0.119 22.6)
-
Step 950
950
#441414
oklch(27% 0.074 23.5)
#C51E30 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) | #564E2F | 0.218 |
| Deuteranopia (no green cones) | #7E7129 | 0.198 |
| Tritanopia (no blue cones) | #D90027 | 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°).
- #C51E30
#C51E30
oklch(53.1% 0.198 22.9)
- #007B83
#007B83
oklch(53.1% 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 #C51E30, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.022
- Cherry #CF0234 ΔE 0.023
- Scarlet #BE0119 ΔE 0.029
- Rose Red #BE013C ΔE 0.033
- Ruby #CA0147 ΔE 0.037
- Dull Red #BB3F3F ΔE 0.041
- Firebrick #B22222 ΔE 0.041
- Crimson #DC143C ΔE 0.048
Use #C51E30 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.