#CB3747
Closest named color: Dull Red (#BB3F3F). oklch(56.4% 0.184 19.6), rgb(203, 55, 71).
Aa
White text reads best on this color (5.02:1).
About this color
#CB3747 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.184 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.034 away. White text reads best on it, at 5.02:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.184) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.17:1 |
| White text | 5.02:1 |
Values
| HEX | #CB3747 |
| RGB | rgb(203, 55, 71) |
| HSL | hsl(354, 59%, 51%) |
| OKLCH | oklch(56.4% 0.184 19.6) |
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 #CB3747 | 5.02:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #CB3747 | 4.17:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #CB3747 text on white | 5.02:1 | AA | Lc 73.5 | Content text, not long reading |
| #CB3747 text on black | 4.17:1 | AA large text | Lc -28.2 | 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
#F6CECD
oklch(88.5% 0.045 19.7)
-
Step 300
300
#F2ACAB
oklch(81% 0.083 20)
-
Step 400
400
#E77C7E
oklch(70.6% 0.132 19.8)
-
Step 500
500
#DD565E
oklch(63.2% 0.169 19.9)
-
Step 600
600 (this color)
#CB3747
oklch(56.4% 0.184 19.6)
-
Step 700
700
#AC2436
oklch(49% 0.171 19.7)
-
Step 800
800
#8C212D
oklch(42.7% 0.142 19.8)
-
Step 900
900
#712229
oklch(37.7% 0.111 19.2)
-
Step 950
950
#421518
oklch(26.9% 0.07 19.2)
#CB3747 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) | #605B47 | 0.202 |
| Deuteranopia (no green cones) | #867A43 | 0.184 |
| Tritanopia (no blue cones) | #DF003E | 0.046 |
| Achromatopsia (no color) | #6F6F6F | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB3747
#CB3747
oklch(56.4% 0.184 19.6)
- #00868C
#00868C
oklch(56.4% 0.096 200.3)
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 #CB3747, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.034
- Faded Red #D3494E ΔE 0.036
- Lipstick #D5174E ΔE 0.038
- Dusty Red #B9484E ΔE 0.039
- Crimson #DC143C ΔE 0.039
- Cherry #CF0234 ΔE 0.040
- Deep Rose #C74767 ΔE 0.043
- Ruby #CA0147 ΔE 0.047
Use #CB3747 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.