#CB3440
Closest named color: Dull Red (#BB3F3F). oklch(56% 0.187 21.7), rgb(203, 52, 64).
Aa
White text reads best on this color (5.11:1).
About this color
#CB3440 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.187 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.032 away. White text reads best on it, at 5.11:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #CB3440 |
| RGB | rgb(203, 52, 64) |
| HSL | hsl(355, 59%, 50%) |
| OKLCH | oklch(56% 0.187 21.7) |
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 #CB3440 | 5.11:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #CB3440 | 4.10:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #CB3440 text on white | 5.11:1 | AA | Lc 73.9 | Content text, not long reading |
| #CB3440 text on black | 4.10:1 | AA large text | Lc -27.8 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CECB
oklch(88.6% 0.047 23)
-
Step 300
300
#F2ABA9
oklch(80.8% 0.084 20.9)
-
Step 400
400
#E87C7B
oklch(70.7% 0.134 21.6)
-
Step 500
500
#DE5559
oklch(63.1% 0.171 21.7)
-
Step 600
600 (this color)
#CB3440
oklch(56% 0.187 21.7)
-
Step 700
700
#AE2231
oklch(49.1% 0.174 21.5)
-
Step 800
800
#8D2029
oklch(42.7% 0.144 21.7)
-
Step 900
900
#712225
oklch(37.7% 0.111 22.1)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#CB3440 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) | #60593F | 0.204 |
| Deuteranopia (no green cones) | #86793B | 0.186 |
| Tritanopia (no blue cones) | #DF003A | 0.045 |
| Achromatopsia (no color) | #6E6E6E | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB3440
#CB3440
oklch(56% 0.187 21.7)
- #00858C
#00858C
oklch(56.1% 0.095 201.3)
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 #CB3440, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.032
- Cherry #CF0234 ΔE 0.036
- Crimson #DC143C ΔE 0.037
- Faded Red #D3494E ΔE 0.040
- Lipstick #D5174E ΔE 0.040
- Dusty Red #B9484E ΔE 0.041
- Ruby #CA0147 ΔE 0.047
- Deep Rose #C74767 ΔE 0.051
Use #CB3440 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.