#428BC5#428BC5

#428BC5 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.6% C 0.114 H 245.2°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#428BC5
RGB	rgb(66, 139, 197)
HSL	hsl(207, 53%, 52%)
HSV	hsv(207, 66%, 77%)
CMYK	cmyk(66.5%, 29.4%, 0%, 22.7%)
CIE-LAB	lab(55.74, -4.31, -36.78)
CIE-LCH	lch(55.74, 37.04, 263.31°)
OKLab	oklab(61.6% -0.0479 -0.1038)
OKLCH	oklch(61.6% 0.114 245.2)
XYZ	xyz(21.5536, 23.6525, 56.2420)
Luminance	0.2366 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC5 #C57C42

analogous

#42C5BE #428BC5 #424AC5

triadic

#428BC5 #C5428B #8BC542

tetradic

#428BC5 #BE42C5 #C57C42 #4AC542

square

#428BC5 #BE42C5 #C57C42 #4AC542

split-complementary

#428BC5 #C5424A #C5BE42

monochromatic

#214B6C #2F6B9A #428BC5 #71A8D3 #A0C4E2

Accessibility & contrast

On white

3.66

#428BC5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#428BC5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC5

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC5	#FFFFFF	#000000	##000000
##428BC5	1.00	3.66	5.73	5.73
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.73	21.00	1.00	1.00
##000000	5.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718DC8

Deuteranopia (green-blind)

#5F80C4

Tritanopia (blue-blind)

#00999F

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428bc5;
/* rgb */ color: rgb(66, 139, 197);
/* oklch */ color: oklch(61.6% 0.114 245.2);

Tailwind

colors: {
  custom: {
    50: '#84acd7',
    500: '#428bc5',
    950: '#000000',
  },
}

SCSS

$custom: #428bc5;
$custom-light: #84acd7;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc5",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 197
  },
  "hsl": {
    "h": 206.565,
    "s": 53.036,
    "l": 51.569
  },
  "oklch": {
    "l": 0.61595,
    "c": 0.11438,
    "h": 245.2
  },
  "luminance": 0.23655
}

Semantic roles & 50–950 ramp

primary

#428BC5

secondary

#CEAE95

accent

#8C4BDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC5

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

Preview Lab → · Contrast checker → · Palette generator →