#CB1737
Closest named color: Cherry (#CF0234). oklch(54% 0.207 20.4), rgb(203, 23, 55).
Aa
White text reads best on this color (5.64:1).
About this color
#CB1737 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.207 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.010 away. White text reads best on it, at 5.64:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.71:1 |
| White text | 5.64:1 |
Values
| HEX | #CB1737 |
| RGB | rgb(203, 23, 55) |
| HSL | hsl(349, 80%, 44%) |
| OKLCH | oklch(54% 0.207 20.4) |
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 #CB1737 | 5.64:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #CB1737 | 3.71:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #CB1737 text on white | 5.64:1 | AA | Lc 76.1 | Fine for body text |
| #CB1737 text on black | 3.71:1 | AA large text | Lc -25.6 | 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
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FACCCB
oklch(88.5% 0.052 19.6)
-
Step 300
300
#F7A9A7
oklch(80.9% 0.093 20.9)
-
Step 400
400
#EF7679
oklch(70.7% 0.149 20.1)
-
Step 500
500
#E54B56
oklch(63% 0.19 20.5)
-
Step 600
600 (this color)
#CB1737
oklch(54% 0.207 20.4)
-
Step 700
700
#B40C2E
oklch(49.1% 0.192 20.4)
-
Step 800
800
#921327
oklch(42.6% 0.159 20.3)
-
Step 900
900
#761B24
oklch(37.8% 0.125 20.4)
-
Step 950
950
#451215
oklch(26.9% 0.078 20.8)
#CB1737 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) | #564F36 | 0.229 |
| Deuteranopia (no green cones) | #817431 | 0.208 |
| Tritanopia (no blue cones) | #E00027 | 0.043 |
| Achromatopsia (no color) | #676767 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB1737
#CB1737
oklch(54% 0.207 20.4)
- #007E84
#007E84
oklch(53.9% 0.092 200.7)
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 #CB1737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.010
- Ruby #CA0147 ΔE 0.027
- Lipstick Red #C0022F ΔE 0.029
- Lipstick #D5174E ΔE 0.035
- Rose Red #BE013C ΔE 0.035
- Crimson #DC143C ΔE 0.035
- Scarlet #BE0119 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.048
Use #CB1737 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.