#428DB9#428DB9

#428DB9 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.5% C 0.100 H 237.2°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#428DB9
RGB	rgb(66, 141, 185)
HSL	hsl(202, 47%, 49%)
HSV	hsv(202, 64%, 73%)
CMYK	cmyk(64.3%, 23.8%, 0%, 27.5%)
CIE-LAB	lab(55.80, -9.49, -29.88)
CIE-LCH	lch(55.80, 31.35, 252.39°)
OKLab	oklab(61.47% -0.0539 -0.0839)
OKLCH	oklch(61.47% 0.1 237.2)
XYZ	xyz(20.5252, 23.7087, 49.3841)
Luminance	0.2371 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB9 #B96E42

analogous

#42B9AA #428DB9 #4252B9

triadic

#428DB9 #B9428D #8DB942

tetradic

#428DB9 #AA42B9 #B96E42 #52B942

square

#428DB9 #AA42B9 #B96E42 #52B942

split-complementary

#428DB9 #B94252 #B9AA42

monochromatic

#22485F #326B8C #428DB9 #6DA8CB #9AC3DB

Accessibility & contrast

On white

3.66

#428DB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#428DB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB9

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB9	#FFFFFF	#000000	##000000
##428DB9	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788CBB

Deuteranopia (green-blind)

#6880B8

Tritanopia (blue-blind)

#00989C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428db9;
/* rgb */ color: rgb(66, 141, 185);
/* oklch */ color: oklch(61.5% 0.100 237.2);

Tailwind

colors: {
  custom: {
    50: '#82aece',
    500: '#428db9',
    950: '#000000',
  },
}

SCSS

$custom: #428db9;
$custom-light: #82aece;
$custom-dark: #000000;

JSON

{
  "hex": "#428db9",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 185
  },
  "hsl": {
    "h": 202.185,
    "s": 47.41,
    "l": 49.216
  },
  "oklch": {
    "l": 0.61465,
    "c": 0.09972,
    "h": 237.2
  },
  "luminance": 0.23711
}

Semantic roles & 50–950 ramp

primary

#428DB9

secondary

#C7A490

accent

#8251D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB9

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

Preview Lab → · Contrast checker → · Palette generator →