#C21B33
Closest named color: Lipstick Red (#C0022F). oklch(52.4% 0.197 21.4), rgb(194, 27, 51).
Aa
White text reads best on this color (6.00:1).
About this color
#C21B33 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.197 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.015 away. White text reads best on it, at 6.00:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.197) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #C21B33 |
| RGB | rgb(194, 27, 51) |
| HSL | hsl(351, 76%, 43%) |
| OKLCH | oklch(52.4% 0.197 21.4) |
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 #C21B33 | 6.00:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #C21B33 | 3.49:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #C21B33 text on white | 6.00:1 | AA | Lc 78.1 | Fine for body text |
| #C21B33 text on black | 3.49:1 | AA large text | Lc -23.7 | 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
#F8CDCB
oklch(88.5% 0.049 21.2)
-
Step 300
300
#F5AAA7
oklch(80.9% 0.089 21.8)
-
Step 400
400
#EC7979
oklch(70.7% 0.142 21.3)
-
Step 500
500
#E25057
oklch(63.1% 0.181 21.3)
-
Step 600
600 (this color)
#C21B33
oklch(52.4% 0.197 21.4)
-
Step 700
700
#B1192E
oklch(49.1% 0.183 21.4)
-
Step 800
800
#901A27
oklch(42.7% 0.152 21.4)
-
Step 900
900
#741E24
oklch(37.7% 0.119 21.3)
-
Step 950
950
#441416
oklch(27% 0.074 21.1)
#C21B33 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) | #534D32 | 0.218 |
| Deuteranopia (no green cones) | #7C6F2D | 0.197 |
| Tritanopia (no blue cones) | #D60027 | 0.040 |
| Achromatopsia (no color) | #636363 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C21B33
#C21B33
oklch(52.4% 0.197 21.4)
- #007980
#007980
oklch(52.4% 0.089 201.9)
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 #C21B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.015
- Rose Red #BE013C ΔE 0.025
- Cherry #CF0234 ΔE 0.026
- Scarlet #BE0119 ΔE 0.027
- Ruby #CA0147 ΔE 0.034
- Firebrick #B22222 ΔE 0.037
- Dull Red #BB3F3F ΔE 0.043
- Lipstick #D5174E ΔE 0.050
Use #C21B33 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.