#428BBE#428BBE

#428BBE is a mid, moderate cyan. Relative luminance 0.233; OKLCH L 61.2% C 0.106 H 241.9°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#428BBE
RGB	rgb(66, 139, 190)
HSL	hsl(205, 49%, 50%)
HSV	hsv(205, 65%, 75%)
CMYK	cmyk(65.3%, 26.8%, 0%, 25.5%)
CIE-LAB	lab(55.42, -6.68, -33.31)
CIE-LCH	lch(55.42, 33.97, 258.66°)
OKLab	oklab(61.24% -0.0501 -0.0938)
OKLCH	oklch(61.24% 0.106 241.9)
XYZ	xyz(20.7701, 23.3391, 52.1155)
Luminance	0.2334 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BBE #BE7542

analogous

#42BEB3 #428BBE #424DBE

triadic

#428BBE #BE428B #8BBE42

tetradic

#428BBE #B342BE #BE7542 #4DBE42

square

#428BBE #B342BE #BE7542 #4DBE42

split-complementary

#428BBE #BE424D #BEB342

monochromatic

#224963 #326A91 #428BBE #70A7CE #9DC3DD

Accessibility & contrast

On white

3.70

#428BBE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#428BBE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BBE

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BBE	#FFFFFF	#000000	##000000
##428BBE	1.00	3.70	5.67	5.67
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#748CC0

Deuteranopia (green-blind)

#637FBD

Tritanopia (blue-blind)

#00989D

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bbe;
/* rgb */ color: rgb(66, 139, 190);
/* oklch */ color: oklch(61.2% 0.106 241.9);

Tailwind

colors: {
  custom: {
    50: '#83acd2',
    500: '#428bbe',
    950: '#000000',
  },
}

SCSS

$custom: #428bbe;
$custom-light: #83acd2;
$custom-dark: #000000;

JSON

{
  "hex": "#428bbe",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 190
  },
  "hsl": {
    "h": 204.677,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.61239,
    "c": 0.10635,
    "h": 241.9
  },
  "luminance": 0.23341
}

Semantic roles & 50–950 ramp

primary

#428BBE

secondary

#CAA992

accent

#884FD8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428BBE

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

Preview Lab → · Contrast checker → · Palette generator →