#428AB9#428AB9

#428AB9 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.8% C 0.101 H 240.0°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#428AB9
RGB	rgb(66, 138, 185)
HSL	hsl(204, 47%, 49%)
HSV	hsv(204, 64%, 73%)
CMYK	cmyk(64.3%, 25.4%, 0%, 27.5%)
CIE-LAB	lab(54.90, -7.78, -31.27)
CIE-LCH	lch(54.90, 32.22, 256.02°)
OKLab	oklab(60.76% -0.0508 -0.0879)
OKLCH	oklch(60.76% 0.101 240)
XYZ	xyz(20.0889, 22.8360, 49.2386)
Luminance	0.2284 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AB9 #B97142

analogous

#42B9AC #428AB9 #424FB9

triadic

#428AB9 #B9428A #8AB942

tetradic

#428AB9 #AC42B9 #B97142 #4FB942

square

#428AB9 #AC42B9 #B97142 #4FB942

split-complementary

#428AB9 #B9424F #B9AC42

monochromatic

#22475F #32688C #428AB9 #6DA6CB #9AC2DB

Accessibility & contrast

On white

3.77

#428AB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#428AB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AB9

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AB9	#FFFFFF	#000000	##000000
##428AB9	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#758ABB

Deuteranopia (green-blind)

#647EB8

Tritanopia (blue-blind)

#00969A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ab9;
/* rgb */ color: rgb(66, 138, 185);
/* oklch */ color: oklch(60.8% 0.101 240.0);

Tailwind

colors: {
  custom: {
    50: '#82acce',
    500: '#428ab9',
    950: '#000000',
  },
}

SCSS

$custom: #428ab9;
$custom-light: #82acce;
$custom-dark: #000000;

JSON

{
  "hex": "#428ab9",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 185
  },
  "hsl": {
    "h": 203.697,
    "s": 47.41,
    "l": 49.216
  },
  "oklch": {
    "l": 0.60757,
    "c": 0.10148,
    "h": 240
  },
  "luminance": 0.22838
}

Semantic roles & 50–950 ramp

primary

#428AB9

secondary

#C7A690

accent

#8651D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428AB9

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

Preview Lab → · Contrast checker → · Palette generator →