#CB3751
Closest named color: Lipstick (#D5174E). oklch(56.6% 0.184 15.6), rgb(203, 55, 81).
Aa
White text reads best on this color (4.99:1).
About this color
#CB3751 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.184 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick (#D5174E), ΔE 0.032 away. White text reads best on it, at 4.99:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.184) |
| Temperature | warm |
| Nearest name | Lipstick (#D5174E) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #CB3751 |
| RGB | rgb(203, 55, 81) |
| HSL | hsl(349, 59%, 51%) |
| OKLCH | oklch(56.6% 0.184 15.6) |
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 #CB3751 | 4.99:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #CB3751 | 4.20:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #CB3751 text on white | 4.99:1 | AA | Lc 73.3 | Content text, not long reading |
| #CB3751 text on black | 4.20:1 | AA large text | Lc -28.4 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F6CECF
oklch(88.6% 0.045 16.3)
-
Step 300
300
#F1ABAF
oklch(80.9% 0.083 15.3)
-
Step 400
400
#E77C85
oklch(70.8% 0.132 15.7)
-
Step 500
500
#DC5567
oklch(63.1% 0.169 15.4)
-
Step 600
600 (this color)
#CB3751
oklch(56.6% 0.184 15.6)
-
Step 700
700
#AC243F
oklch(49.2% 0.171 15.7)
-
Step 800
800
#8C2134
oklch(42.8% 0.142 15.8)
-
Step 900
900
#70222D
oklch(37.7% 0.11 16)
-
Step 950
950
#42151B
oklch(27% 0.07 15.1)
#CB3751 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) | #5F5C51 | 0.203 |
| Deuteranopia (no green cones) | #857B4D | 0.187 |
| Tritanopia (no blue cones) | #DE0342 | 0.045 |
| Achromatopsia (no color) | #6F6F6F | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB3751
#CB3751
oklch(56.6% 0.184 15.6)
- #008888
#008888
oklch(56.7% 0.097 194.8)
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 #CB3751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick #D5174E ΔE 0.032
- Deep Rose #C74767 ΔE 0.033
- Dark Pink #CB416B ΔE 0.035
- Faded Red #D3494E ΔE 0.039
- Dusty Red #B9484E ΔE 0.041
- Dull Red #BB3F3F ΔE 0.041
- Crimson #DC143C ΔE 0.042
- Ruby #CA0147 ΔE 0.044
Use #CB3751 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.