#CB3F37
Closest named color: Faded Red (#D3494E). oklch(57% 0.178 27.5), rgb(203, 63, 55).
Aa
White text reads best on this color (4.87:1).
About this color
#CB3F37 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.178 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Faded Red (#D3494E), ΔE 0.033 away. White text reads best on it, at 4.87:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Faded Red (#D3494E) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #CB3F37 |
| RGB | rgb(203, 63, 55) |
| HSL | hsl(3, 59%, 51%) |
| OKLCH | oklch(57% 0.178 27.5) |
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 #CB3F37 | 4.87:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #CB3F37 | 4.30:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #CB3F37 text on white | 4.87:1 | AA | Lc 72.7 | Content text, not long reading |
| #CB3F37 text on black | 4.30:1 | AA large text | Lc -29.0 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E4E1
oklch(93.5% 0.023 27.3)
-
Step 200
200
#F5CFC9
oklch(88.5% 0.044 28.5)
-
Step 300
300
#F0ADA4
oklch(80.8% 0.08 27.6)
-
Step 400
400
#E57F74
oklch(70.6% 0.128 27.2)
-
Step 500
500
#DB5A4F
oklch(63.1% 0.164 27.6)
-
Step 600
600 (this color)
#CB3F37
oklch(57% 0.178 27.5)
-
Step 700
700
#AB2B25
oklch(49.2% 0.166 27.8)
-
Step 800
800
#8B2620
oklch(42.8% 0.137 27.9)
-
Step 900
900
#702520
oklch(37.8% 0.107 27.2)
-
Step 950
950
#421713
oklch(27.1% 0.068 27.8)
#CB3F37 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) | #675E35 | 0.189 |
| Deuteranopia (no green cones) | #8A7C32 | 0.173 |
| Tritanopia (no blue cones) | #DF103E | 0.056 |
| Achromatopsia (no color) | #717171 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB3F37
#CB3F37
oklch(57% 0.178 27.5)
- #008795
#008795
oklch(57% 0.098 207.6)
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 #CB3F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Red #D3494E ΔE 0.033
- Dull Red #BB3F3F ΔE 0.033
- Dark Coral #CF524E ΔE 0.038
- Dusty Red #B9484E ΔE 0.041
- Brick Orange #C14A09 ΔE 0.046
- Sinopia #BB3E03 ΔE 0.048
- Crimson #DC143C ΔE 0.051
- Pale Red #D9544D ΔE 0.051
Use #CB3F37 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.