#4290D5#4290D5

#4290D5 is a light, vivid cyan. Relative luminance 0.259; OKLCH L 63.6% C 0.129 H 248.1°. Best body text is #000000 at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#4290D5
RGB	rgb(66, 144, 213)
HSL	hsl(208, 64%, 55%)
HSV	hsv(208, 69%, 84%)
CMYK	cmyk(69%, 32.4%, 0%, 16.5%)
CIE-LAB	lab(57.95, -1.72, -42.33)
CIE-LCH	lch(57.95, 42.36, 267.67°)
OKLab	oklab(63.59% -0.0482 -0.1199)
OKLCH	oklch(63.59% 0.129 248.1)
XYZ	xyz(24.2257, 25.9063, 66.6616)
Luminance	0.2591 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290D5 #D58742

analogous

#42D5D0 #4290D5 #4247D5

triadic

#4290D5 #D54290 #90D542

tetradic

#4290D5 #D042D5 #D58742 #47D542

square

#4290D5 #D042D5 #D58742 #47D542

split-complementary

#4290D5 #D54247 #D5D042

monochromatic

#1C5180 #2871B2 #4290D5 #74ADE0 #A6CBEB

Accessibility & contrast

On white

3.40

#4290D5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.18

#4290D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290D5

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290D5	#FFFFFF	#000000	##000000
##4290D5	1.00	3.40	6.18	6.18
#FFFFFF	3.40	1.00	21.00	21.00
#000000	6.18	21.00	1.00	1.00
##000000	6.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7193D8

Deuteranopia (green-blind)

#5D85D4

Tritanopia (blue-blind)

#00A0A9

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #4290d5;
/* rgb */ color: rgb(66, 144, 213);
/* oklch */ color: oklch(63.6% 0.129 248.1);

Tailwind

colors: {
  custom: {
    50: '#87b0e2',
    500: '#4290d5',
    950: '#000000',
  },
}

SCSS

$custom: #4290d5;
$custom-light: #87b0e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4290d5",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 213
  },
  "hsl": {
    "h": 208.163,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.63585,
    "c": 0.12926,
    "h": 248.1
  },
  "luminance": 0.25909
}

Semantic roles & 50–950 ramp

primary

#4290D5

secondary

#D8B89A

accent

#8F41E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4290D5

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

Preview Lab → · Contrast checker → · Palette generator →