#CB183B
Closest named color: Cherry (#CF0234). oklch(54.1% 0.206 19.2), rgb(203, 24, 59).
Aa
White text reads best on this color (5.62:1).
About this color
#CB183B is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.206 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.011 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.206) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #CB183B |
| RGB | rgb(203, 24, 59) |
| HSL | hsl(348, 79%, 45%) |
| OKLCH | oklch(54.1% 0.206 19.2) |
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 #CB183B | 5.62:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #CB183B | 3.73:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #CB183B text on white | 5.62:1 | AA | Lc 76.0 | Fine for body text |
| #CB183B text on black | 3.73:1 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E3
oklch(93.6% 0.028 17.7)
-
Step 200
200
#FACCCC
oklch(88.5% 0.052 18.2)
-
Step 300
300
#F7A9A9
oklch(81% 0.092 19.3)
-
Step 400
400
#EF767B
oklch(70.7% 0.149 19.1)
-
Step 500
500
#E54B59
oklch(63.1% 0.19 19.4)
-
Step 600
600 (this color)
#CB183B
oklch(54.1% 0.206 19.2)
-
Step 700
700
#B40C31
oklch(49.1% 0.192 19.3)
-
Step 800
800
#921329
oklch(42.7% 0.159 19.4)
-
Step 900
900
#751B26
oklch(37.6% 0.123 19)
-
Step 950
950
#451216
oklch(27% 0.078 19.6)
#CB183B 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) | #55503B | 0.230 |
| Deuteranopia (no green cones) | #807435 | 0.209 |
| Tritanopia (no blue cones) | #DF0029 | 0.042 |
| Achromatopsia (no color) | #676767 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB183B
#CB183B
oklch(54.1% 0.206 19.2)
- #007F83
#007F83
oklch(54.2% 0.092 198.7)
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 #CB183B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.011
- Ruby #CA0147 ΔE 0.023
- Lipstick Red #C0022F ΔE 0.030
- Lipstick #D5174E ΔE 0.031
- Rose Red #BE013C ΔE 0.034
- Crimson #DC143C ΔE 0.034
- Scarlet #BE0119 ΔE 0.044
- Dull Red #BB3F3F ΔE 0.049
Use #CB183B 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.