#428EB4#428EB4

#428EB4 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.5% C 0.094 H 233.0°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#428EB4
RGB	rgb(66, 142, 180)
HSL	hsl(200, 46%, 48%)
HSV	hsv(200, 63%, 71%)
CMYK	cmyk(63.3%, 21.1%, 0%, 29.4%)
CIE-LAB	lab(55.88, -11.69, -26.89)
CIE-LCH	lch(55.88, 29.32, 246.51°)
OKLab	oklab(61.47% -0.0568 -0.0753)
OKLCH	oklch(61.47% 0.094 233)
XYZ	xyz(20.1548, 23.7975, 46.7024)
Luminance	0.2380 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB4 #B46842

analogous

#42B4A1 #428EB4 #4255B4

triadic

#428EB4 #B4428E #8EB442

tetradic

#428EB4 #A142B4 #B46842 #55B442

square

#428EB4 #A142B4 #B46842 #55B442

split-complementary

#428EB4 #B44255 #B4A142

monochromatic

#21475A #326B87 #428EB4 #6BA9C9 #97C3D9

Accessibility & contrast

On white

3.65

#428EB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#428EB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB4

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB4	#FFFFFF	#000000	##000000
##428EB4	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8CB6

Deuteranopia (green-blind)

#6C81B3

Tritanopia (blue-blind)

#00989B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428eb4;
/* rgb */ color: rgb(66, 142, 180);
/* oklch */ color: oklch(61.5% 0.094 233.0);

Tailwind

colors: {
  custom: {
    50: '#82afca',
    500: '#428eb4',
    950: '#000000',
  },
}

SCSS

$custom: #428eb4;
$custom-light: #82afca;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb4",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 180
  },
  "hsl": {
    "h": 200,
    "s": 46.341,
    "l": 48.235
  },
  "oklch": {
    "l": 0.61467,
    "c": 0.0943,
    "h": 233
  },
  "luminance": 0.238
}

Semantic roles & 50–950 ramp

primary

#428EB4

secondary

#C5A08D

accent

#7E52D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428EB4

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

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