#C21B53
Closest named color: Ruby (#CA0147). oklch(53.1% 0.198 9.2), rgb(194, 27, 83).
Aa
White text reads best on this color (5.87:1).
About this color
#C21B53 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.198 and its hue 9°. Its hue sits on the warm side of the wheel. The nearest named color is Ruby (#CA0147), ΔE 0.022 away. White text reads best on it, at 5.87:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Ruby (#CA0147) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #C21B53 |
| RGB | rgb(194, 27, 83) |
| HSL | hsl(340, 76%, 43%) |
| OKLCH | oklch(53.1% 0.198 9.2) |
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 #C21B53 | 5.87:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #C21B53 | 3.57:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #C21B53 text on white | 5.87:1 | AA | Lc 77.5 | Fine for body text |
| #C21B53 text on black | 3.57:1 | 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
#FDF2F4
oklch(97% 0.012 4.7)
-
Step 100
100
#FAE3E6
oklch(93.5% 0.026 8.6)
-
Step 200
200
#F8CCD2
oklch(88.5% 0.05 8.9)
-
Step 300
300
#F4A9B4
oklch(81% 0.089 9.6)
-
Step 400
400
#EA778D
oklch(70.6% 0.143 9.4)
-
Step 500
500
#E04E72
oklch(63.2% 0.182 9.1)
-
Step 600
600 (this color)
#C21B53
oklch(53.1% 0.198 9.2)
-
Step 700
700
#AF164A
oklch(49.1% 0.184 9.2)
-
Step 800
800
#8E183D
oklch(42.7% 0.153 9)
-
Step 900
900
#721D34
oklch(37.6% 0.119 9)
-
Step 950
950
#43131E
oklch(26.9% 0.075 9.7)
#C21B53 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) | #4E4F54 | 0.224 |
| Deuteranopia (no green cones) | #78704F | 0.202 |
| Tritanopia (no blue cones) | #D40036 | 0.050 |
| Achromatopsia (no color) | #646464 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C21B53
#C21B53
oklch(53.1% 0.198 9.2)
- #007D77
#007D77
oklch(53.2% 0.092 188.9)
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 #C21B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ruby #CA0147 ΔE 0.022
- Rose Red #BE013C ΔE 0.032
- Lipstick #D5174E ΔE 0.040
- Lipstick Red #C0022F ΔE 0.045
- Cherry #CF0234 ΔE 0.045
- Raspberry #B00149 ΔE 0.046
- Dark Hot Pink #D90166 ΔE 0.052
- Dark Pink #CB416B ΔE 0.057
Use #C21B53 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.