#4290D3#4290D3

#4290D3 is a light, vivid cyan. Relative luminance 0.258; OKLCH L 63.5% C 0.127 H 247.4°. Best body text is #000000 at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#4290D3
RGB	rgb(66, 144, 211)
HSL	hsl(208, 62%, 54%)
HSV	hsv(208, 69%, 83%)
CMYK	cmyk(68.7%, 31.8%, 0%, 17.3%)
CIE-LAB	lab(57.85, -2.41, -41.36)
CIE-LCH	lch(57.85, 41.43, 266.66°)
OKLab	oklab(63.48% -0.0488 -0.1171)
OKLCH	oklch(63.48% 0.127 247.4)
XYZ	xyz(23.9735, 25.8054, 65.3329)
Luminance	0.2581 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290D3 #D38542

analogous

#42D3CE #4290D3 #4248D3

triadic

#4290D3 #D34290 #90D342

tetradic

#4290D3 #CE42D3 #D38542 #48D342

square

#4290D3 #CE42D3 #D38542 #48D342

split-complementary

#4290D3 #D34248 #D3CE42

monochromatic

#1D517D #2971AF #4290D3 #74ADDF #A5CAEA

Accessibility & contrast

On white

3.41

#4290D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.16

#4290D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290D3

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290D3	#FFFFFF	#000000	##000000
##4290D3	1.00	3.41	6.16	6.16
#FFFFFF	3.41	1.00	21.00	21.00
#000000	6.16	21.00	1.00	1.00
##000000	6.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7293D6

Deuteranopia (green-blind)

#5E85D2

Tritanopia (blue-blind)

#00A0A8

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #4290d3;
/* rgb */ color: rgb(66, 144, 211);
/* oklch */ color: oklch(63.5% 0.127 247.4);

Tailwind

colors: {
  custom: {
    50: '#86b0e1',
    500: '#4290d3',
    950: '#000000',
  },
}

SCSS

$custom: #4290d3;
$custom-light: #86b0e1;
$custom-dark: #000000;

JSON

{
  "hex": "#4290d3",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 211
  },
  "hsl": {
    "h": 207.724,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.63477,
    "c": 0.12687,
    "h": 247.4
  },
  "luminance": 0.25808
}

Semantic roles & 50–950 ramp

primary

#4290D3

secondary

#D7B69A

accent

#8E42E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4290D3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →