#CB0B18
Closest named color: Cherry (#CF0234). oklch(53.3% 0.213 27.1), rgb(203, 11, 24).
Aa
White text reads best on this color (5.83:1).
About this color
#CB0B18 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.213 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.027 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.60:1 |
| White text | 5.83:1 |
Values
| HEX | #CB0B18 |
| RGB | rgb(203, 11, 24) |
| HSL | hsl(356, 90%, 42%) |
| OKLCH | oklch(53.3% 0.213 27.1) |
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 #CB0B18 | 5.83:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #CB0B18 | 3.60:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #CB0B18 text on white | 5.83:1 | AA | Lc 76.7 | Fine for body text |
| #CB0B18 text on black | 3.60:1 | AA large text | Lc -25.1 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FBCCC6
oklch(88.4% 0.054 26.7)
-
Step 300
300
#F9A99F
oklch(81% 0.096 27.2)
-
Step 400
400
#F1766B
oklch(70.7% 0.154 26.9)
-
Step 500
500
#E84A42
oklch(63.1% 0.196 27.2)
-
Step 600
600 (this color)
#CB0B18
oklch(53.3% 0.213 27.1)
-
Step 700
700
#B70513
oklch(49.2% 0.198 27.1)
-
Step 800
800
#941013
oklch(42.6% 0.164 27.2)
-
Step 900
900
#771A17
oklch(37.7% 0.128 27.3)
-
Step 950
950
#46120F
oklch(27% 0.08 27.1)
#CB0B18 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) | #564C14 | 0.234 |
| Deuteranopia (no green cones) | #817306 | 0.212 |
| Tritanopia (no blue cones) | #E00016 | 0.042 |
| Achromatopsia (no color) | #656565 | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB0B18
#CB0B18
oklch(53.3% 0.213 27.1)
- #007B87
#007B87
oklch(53.3% 0.091 206.7)
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 #CB0B18, closest first.
No curated palette has a color within ΔE 0.04 of #CB0B18.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.027
- Scarlet #BE0119 ΔE 0.029
- Lipstick Red #C0022F ΔE 0.033
- Crimson #DC143C ΔE 0.048
- Rose Red #BE013C ΔE 0.048
- Firebrick #B22222 ΔE 0.049
- Ruby #CA0147 ΔE 0.050
- Dull Red #BB3F3F ΔE 0.055
Use #CB0B18 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.