#428EB5#428EB5

#428EB5 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.5% C 0.095 H 233.7°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#428EB5
RGB	rgb(66, 142, 181)
HSL	hsl(200, 47%, 48%)
HSV	hsv(200, 64%, 71%)
CMYK	cmyk(63.5%, 21.5%, 0%, 29%)
CIE-LAB	lab(55.93, -11.36, -27.40)
CIE-LCH	lch(55.93, 29.66, 247.48°)
OKLab	oklab(61.51% -0.0564 -0.0767)
OKLCH	oklch(61.51% 0.095 233.7)
XYZ	xyz(20.2570, 23.8384, 47.2408)
Luminance	0.2384 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB5 #B56942

analogous

#42B5A2 #428EB5 #4254B5

triadic

#428EB5 #B5428E #8EB542

tetradic

#428EB5 #A242B5 #B56942 #54B542

square

#428EB5 #A242B5 #B56942 #54B542

split-complementary

#428EB5 #B54254 #B5A242

monochromatic

#21485B #326B88 #428EB5 #6BA9C9 #98C3D9

Accessibility & contrast

On white

3.64

#428EB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.77

#428EB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB5

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB5	#FFFFFF	#000000	##000000
##428EB5	1.00	3.64	5.77	5.77
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.77	21.00	1.00	1.00
##000000	5.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8DB7

Deuteranopia (green-blind)

#6B81B4

Tritanopia (blue-blind)

#00989B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428eb5;
/* rgb */ color: rgb(66, 142, 181);
/* oklch */ color: oklch(61.5% 0.095 233.7);

Tailwind

colors: {
  custom: {
    50: '#82afcb',
    500: '#428eb5',
    950: '#000000',
  },
}

SCSS

$custom: #428eb5;
$custom-light: #82afcb;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb5",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 181
  },
  "hsl": {
    "h": 200.348,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.61513,
    "c": 0.09525,
    "h": 233.7
  },
  "luminance": 0.2384
}

Semantic roles & 50–950 ramp

primary

#428EB5

secondary

#C5A08E

accent

#7F52D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428EB5

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

Preview Lab → · Contrast checker → · Palette generator →