#428DB1#428DB1

#428DB1 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.1% C 0.092 H 231.8°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#428DB1
RGB	rgb(66, 141, 177)
HSL	hsl(199, 46%, 48%)
HSV	hsv(199, 63%, 69%)
CMYK	cmyk(62.7%, 20.3%, 0%, 30.6%)
CIE-LAB	lab(55.46, -12.10, -25.83)
CIE-LCH	lch(55.46, 28.53, 244.90°)
OKLab	oklab(61.09% -0.0568 -0.0722)
OKLCH	oklch(61.09% 0.092 231.8)
XYZ	xyz(19.7044, 23.3804, 45.0609)
Luminance	0.2338 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB1 #B16642

analogous

#42B19D #428DB1 #4256B1

triadic

#428DB1 #B1428D #8DB142

tetradic

#428DB1 #9D42B1 #B16642 #56B142

square

#428DB1 #9D42B1 #B16642 #56B142

split-complementary

#428DB1 #B14256 #B19D42

monochromatic

#214658 #316984 #428DB1 #69A9C7 #96C2D8

Accessibility & contrast

On white

3.70

#428DB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.68

#428DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB1

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB1	#FFFFFF	#000000	##000000
##428DB1	1.00	3.70	5.68	5.68
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.68	21.00	1.00	1.00
##000000	5.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8BB3

Deuteranopia (green-blind)

#6C80B0

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428db1;
/* rgb */ color: rgb(66, 141, 177);
/* oklch */ color: oklch(61.1% 0.092 231.8);

Tailwind

colors: {
  custom: {
    50: '#81aec8',
    500: '#428db1',
    950: '#000000',
  },
}

SCSS

$custom: #428db1;
$custom-light: #81aec8;
$custom-dark: #000000;

JSON

{
  "hex": "#428db1",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 177
  },
  "hsl": {
    "h": 199.459,
    "s": 45.679,
    "l": 47.647
  },
  "oklch": {
    "l": 0.6109,
    "c": 0.0919,
    "h": 231.8
  },
  "luminance": 0.23382
}

Semantic roles & 50–950 ramp

primary

#428DB1

secondary

#C39E8B

accent

#7D52D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB1

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

Preview Lab → · Contrast checker → · Palette generator →