#CB103F
Closest named color: Cherry (#CF0234). oklch(53.9% 0.209 17.2), rgb(203, 16, 63).
Aa
White text reads best on this color (5.69:1).
About this color
#CB103F is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.209 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.014 away. White text reads best on it, at 5.69:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.209) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #CB103F |
| RGB | rgb(203, 16, 63) |
| HSL | hsl(345, 85%, 43%) |
| OKLCH | oklch(53.9% 0.209 17.2) |
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 #CB103F | 5.69:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #CB103F | 3.68:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #CB103F text on white | 5.69:1 | AA | Lc 76.2 | Fine for body text |
| #CB103F text on black | 3.68:1 | AA large text | Lc -25.5 | 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
#FACCCD
oklch(88.5% 0.052 16.7)
-
Step 300
300
#F7A8AA
oklch(80.9% 0.094 17.7)
-
Step 400
400
#EF757E
oklch(70.7% 0.15 17.1)
-
Step 500
500
#E6495D
oklch(63.1% 0.192 17.4)
-
Step 600
600 (this color)
#CB103F
oklch(53.9% 0.209 17.2)
-
Step 700
700
#B50436
oklch(49.2% 0.195 17.1)
-
Step 800
800
#93102D
oklch(42.8% 0.161 17.2)
-
Step 900
900
#761A28
oklch(37.8% 0.125 17.5)
-
Step 950
950
#451118
oklch(26.9% 0.079 16.5)
#CB103F 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) | #534F3F | 0.234 |
| Deuteranopia (no green cones) | #7F7439 | 0.214 |
| Tritanopia (no blue cones) | #DF0028 | 0.046 |
| Achromatopsia (no color) | #676767 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB103F
#CB103F
oklch(53.9% 0.209 17.2)
- #007E81
#007E81
oklch(53.8% 0.092 197.7)
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 #CB103F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.014
- Ruby #CA0147 ΔE 0.015
- Lipstick #D5174E ΔE 0.028
- Lipstick Red #C0022F ΔE 0.030
- Rose Red #BE013C ΔE 0.030
- Crimson #DC143C ΔE 0.037
- Scarlet #BE0119 ΔE 0.046
- Dull Red #BB3F3F ΔE 0.054
Use #CB103F 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.