#C51833
Closest named color: Lipstick Red (#C0022F). oklch(52.9% 0.201 21.3), rgb(197, 24, 51).
Aa
White text reads best on this color (5.91:1).
About this color
#C51833 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.201 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.018 away. White text reads best on it, at 5.91:1.
| 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 | 5.91:1 |
Values
| HEX | #C51833 |
| RGB | rgb(197, 24, 51) |
| HSL | hsl(351, 78%, 43%) |
| OKLCH | oklch(52.9% 0.201 21.3) |
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 #C51833 | 5.91:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #C51833 | 3.55:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #C51833 text on white | 5.91:1 | AA | Lc 77.5 | Fine for body text |
| #C51833 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
#F9CDCB
oklch(88.6% 0.05 21.2)
-
Step 300
300
#F6A9A7
oklch(80.8% 0.091 20.9)
-
Step 400
400
#ED7878
oklch(70.7% 0.145 21.4)
-
Step 500
500
#E44E56
oklch(63.2% 0.186 21.2)
-
Step 600
600 (this color)
#C51833
oklch(52.9% 0.201 21.3)
-
Step 700
700
#B3142D
oklch(49.2% 0.188 21.4)
-
Step 800
800
#911726
oklch(42.7% 0.155 21.3)
-
Step 900
900
#741D24
oklch(37.6% 0.12 20.9)
-
Step 950
950
#451315
oklch(27.1% 0.077 21.6)
#C51833 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) | #544D32 | 0.222 |
| Deuteranopia (no green cones) | #7D712D | 0.203 |
| Tritanopia (no blue cones) | #D90026 | 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°).
- #C51833
#C51833
oklch(52.9% 0.201 21.3)
- #007A81
#007A81
oklch(52.7% 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 #C51833, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.018
- Cherry #CF0234 ΔE 0.020
- Rose Red #BE013C ΔE 0.027
- Scarlet #BE0119 ΔE 0.029
- Ruby #CA0147 ΔE 0.031
- Firebrick #B22222 ΔE 0.043
- Dull Red #BB3F3F ΔE 0.045
- Lipstick #D5174E ΔE 0.046
Use #C51833 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.