#428BC0#428BC0

#428BC0 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.3% C 0.109 H 242.9°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#428BC0
RGB	rgb(66, 139, 192)
HSL	hsl(205, 50%, 51%)
HSV	hsv(205, 66%, 75%)
CMYK	cmyk(65.6%, 27.6%, 0%, 24.7%)
CIE-LAB	lab(55.51, -6.01, -34.31)
CIE-LCH	lch(55.51, 34.83, 260.07°)
OKLab	oklab(61.34% -0.0495 -0.0967)
OKLCH	oklch(61.34% 0.109 242.9)
XYZ	xyz(20.9902, 23.4271, 53.2746)
Luminance	0.2343 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC0 #C07742

analogous

#42C0B6 #428BC0 #424CC0

triadic

#428BC0 #C0428B #8BC042

tetradic

#428BC0 #B642C0 #C07742 #4CC042

square

#428BC0 #B642C0 #C07742 #4CC042

split-complementary

#428BC0 #C0424C #C0B642

monochromatic

#224966 #316A94 #428BC0 #70A7CF #9EC3DF

Accessibility & contrast

On white

3.69

#428BC0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#428BC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC0

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC0	#FFFFFF	#000000	##000000
##428BC0	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#738CC2

Deuteranopia (green-blind)

#627FBF

Tritanopia (blue-blind)

#00989D

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bc0;
/* rgb */ color: rgb(66, 139, 192);
/* oklch */ color: oklch(61.3% 0.109 242.9);

Tailwind

colors: {
  custom: {
    50: '#83acd3',
    500: '#428bc0',
    950: '#000000',
  },
}

SCSS

$custom: #428bc0;
$custom-light: #83acd3;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc0",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 192
  },
  "hsl": {
    "h": 205.238,
    "s": 50,
    "l": 50.588
  },
  "oklch": {
    "l": 0.6134,
    "c": 0.1086,
    "h": 242.9
  },
  "luminance": 0.23429
}

Semantic roles & 50–950 ramp

primary

#428BC0

secondary

#CBAA93

accent

#894EDA

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428BC0

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

Preview Lab → · Contrast checker → · Palette generator →