#CB0551
Closest named color: Ruby (#CA0147). oklch(53.9% 0.214 10.2), rgb(203, 5, 81).
Aa
White text reads best on this color (5.70:1).
About this color
#CB0551 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.214 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Ruby (#CA0147), ΔE 0.014 away. White text reads best on it, at 5.70:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.214) |
| Temperature | warm |
| Nearest name | Ruby (#CA0147) |
| Black text | 3.67:1 |
| White text | 5.70:1 |
Values
| HEX | #CB0551 |
| RGB | rgb(203, 5, 81) |
| HSL | hsl(337, 95%, 41%) |
| OKLCH | oklch(53.9% 0.214 10.2) |
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 #CB0551 | 5.70:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #CB0551 | 3.67:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #CB0551 text on white | 5.70:1 | AA | Lc 76.0 | Fine for body text |
| #CB0551 text on black | 3.67:1 | AA large text | Lc -25.7 | 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
#FEF2F3
oklch(97.1% 0.013 11.5)
-
Step 100
100
#FCE3E5
oklch(93.7% 0.028 12.1)
-
Step 200
200
#FACBD1
oklch(88.4% 0.054 9.6)
-
Step 300
300
#F7A7B2
oklch(80.9% 0.095 10.4)
-
Step 400
400
#EF738A
oklch(70.7% 0.154 10.2)
-
Step 500
500
#E6466D
oklch(63.2% 0.197 10.5)
-
Step 600
600 (this color)
#CB0551
oklch(53.9% 0.214 10.2)
-
Step 700
700
#B40046
oklch(49.2% 0.197 10.4)
-
Step 800
800
#920A3A
oklch(42.6% 0.164 9.8)
-
Step 900
900
#761731
oklch(37.7% 0.129 10.5)
-
Step 950
950
#45101D
oklch(26.9% 0.081 9.9)
#CB0551 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) | #4E4F52 | 0.242 |
| Deuteranopia (no green cones) | #7C734C | 0.218 |
| Tritanopia (no blue cones) | #DF002F | 0.060 |
| Achromatopsia (no color) | #666666 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB0551
#CB0551
oklch(53.9% 0.214 10.2)
- #007F7B
#007F7B
oklch(53.9% 0.093 190.9)
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 #CB0551, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ruby #CA0147 ΔE 0.014
- Lipstick #D5174E ΔE 0.027
- Rose Red #BE013C ΔE 0.038
- Cherry #CF0234 ΔE 0.038
- Dark Hot Pink #D90166 ΔE 0.040
- Cerise #DE0C62 ΔE 0.045
- Lipstick Red #C0022F ΔE 0.048
- Crimson #DC143C ΔE 0.050
Use #CB0551 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.