#428BBD#428BBD

#428BBD is a mid, moderate cyan. Relative luminance 0.233; OKLCH L 61.2% C 0.105 H 241.3°. Best body text is #000000 at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#428BBD
RGB	rgb(66, 139, 189)
HSL	hsl(204, 48%, 50%)
HSV	hsv(204, 65%, 74%)
CMYK	cmyk(65.1%, 26.5%, 0%, 25.9%)
CIE-LAB	lab(55.38, -7.02, -32.81)
CIE-LCH	lch(55.38, 33.55, 257.93°)
OKLab	oklab(61.19% -0.0505 -0.0923)
OKLCH	oklch(61.19% 0.105 241.3)
XYZ	xyz(20.6612, 23.2955, 51.5419)
Luminance	0.2330 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BBD #BD7442

analogous

#42BDB1 #428BBD #424EBD

triadic

#428BBD #BD428B #8BBD42

tetradic

#428BBD #B142BD #BD7442 #4EBD42

square

#428BBD #B142BD #BD7442 #4EBD42

split-complementary

#428BBD #BD424E #BDB142

monochromatic

#224862 #326A90 #428BBD #6FA7CD #9DC3DD

Accessibility & contrast

On white

3.71

#428BBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.66

#428BBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BBD

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BBD	#FFFFFF	#000000	##000000
##428BBD	1.00	3.71	5.66	5.66
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.66	21.00	1.00	1.00
##000000	5.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#748BBF

Deuteranopia (green-blind)

#647FBC

Tritanopia (blue-blind)

#00979C

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bbd;
/* rgb */ color: rgb(66, 139, 189);
/* oklch */ color: oklch(61.2% 0.105 241.3);

Tailwind

colors: {
  custom: {
    50: '#83acd1',
    500: '#428bbd',
    950: '#000000',
  },
}

SCSS

$custom: #428bbd;
$custom-light: #83acd1;
$custom-dark: #000000;

JSON

{
  "hex": "#428bbd",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 189
  },
  "hsl": {
    "h": 204.39,
    "s": 48.235,
    "l": 50
  },
  "oklch": {
    "l": 0.61189,
    "c": 0.10523,
    "h": 241.3
  },
  "luminance": 0.23298
}

Semantic roles & 50–950 ramp

primary

#428BBD

secondary

#C9A892

accent

#8750D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428BBD

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

Preview Lab → · Contrast checker → · Palette generator →