#428BC2#428BC2

#428BC2 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.4% C 0.111 H 243.9°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#428BC2
RGB	rgb(66, 139, 194)
HSL	hsl(206, 51%, 51%)
HSV	hsv(206, 66%, 76%)
CMYK	cmyk(66%, 28.4%, 0%, 23.9%)
CIE-LAB	lab(55.60, -5.33, -35.30)
CIE-LCH	lch(55.60, 35.70, 261.41°)
OKLab	oklab(61.44% -0.0489 -0.0995)
OKLCH	oklch(61.44% 0.111 243.9)
XYZ	xyz(21.2133, 23.5163, 54.4496)
Luminance	0.2352 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC2 #C27942

analogous

#42C2B9 #428BC2 #424BC2

triadic

#428BC2 #C2428B #8BC242

tetradic

#428BC2 #B942C2 #C27942 #4BC242

square

#428BC2 #B942C2 #C27942 #4BC242

split-complementary

#428BC2 #C2424B #C2B942

monochromatic

#224A68 #316B96 #428BC2 #70A7D1 #9FC4E0

Accessibility & contrast

On white

3.68

#428BC2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#428BC2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC2

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC2	#FFFFFF	#000000	##000000
##428BC2	1.00	3.68	5.70	5.70
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.70	21.00	1.00	1.00
##000000	5.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#728CC4

Deuteranopia (green-blind)

#6180C1

Tritanopia (blue-blind)

#00989E

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bc2;
/* rgb */ color: rgb(66, 139, 194);
/* oklch */ color: oklch(61.4% 0.111 243.9);

Tailwind

colors: {
  custom: {
    50: '#83acd4',
    500: '#428bc2',
    950: '#000000',
  },
}

SCSS

$custom: #428bc2;
$custom-light: #83acd4;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc2",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 194
  },
  "hsl": {
    "h": 205.781,
    "s": 51.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.61441,
    "c": 0.11089,
    "h": 243.9
  },
  "luminance": 0.23519
}

Semantic roles & 50–950 ramp

primary

#428BC2

secondary

#CCAC94

accent

#8A4DDB

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC2

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

Preview Lab → · Contrast checker → · Palette generator →