#428EBA#428EBA

#428EBA is a mid, moderate cyan. Relative luminance 0.240; OKLCH L 61.7% C 0.100 H 236.9°. Best body text is #000000 at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#428EBA
RGB	rgb(66, 142, 186)
HSL	hsl(202, 48%, 49%)
HSV	hsv(202, 65%, 73%)
CMYK	cmyk(64.5%, 23.7%, 0%, 27.1%)
CIE-LAB	lab(56.14, -9.72, -29.92)
CIE-LCH	lch(56.14, 31.46, 252.01°)
OKLab	oklab(61.75% -0.0547 -0.084)
OKLCH	oklch(61.75% 0.1 236.9)
XYZ	xyz(20.7793, 24.0473, 49.9914)
Luminance	0.2405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EBA #BA6E42

analogous

#42BAAA #428EBA #4252BA

triadic

#428EBA #BA428E #8EBA42

tetradic

#428EBA #AA42BA #BA6E42 #52BA42

square

#428EBA #AA42BA #BA6E42 #52BA42

split-complementary

#428EBA #BA4252 #BAAA42

monochromatic

#224960 #326C8D #428EBA #6EA9CB #9BC4DB

Accessibility & contrast

On white

3.61

#428EBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.81

#428EBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EBA

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EBA	#FFFFFF	#000000	##000000
##428EBA	1.00	3.61	5.81	5.81
#FFFFFF	3.61	1.00	21.00	21.00
#000000	5.81	21.00	1.00	1.00
##000000	5.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798DBC

Deuteranopia (green-blind)

#6981B9

Tritanopia (blue-blind)

#00999D

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428eba;
/* rgb */ color: rgb(66, 142, 186);
/* oklch */ color: oklch(61.7% 0.100 236.9);

Tailwind

colors: {
  custom: {
    50: '#82afcf',
    500: '#428eba',
    950: '#000000',
  },
}

SCSS

$custom: #428eba;
$custom-light: #82afcf;
$custom-dark: #000000;

JSON

{
  "hex": "#428eba",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 186
  },
  "hsl": {
    "h": 202,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.61749,
    "c": 0.10021,
    "h": 236.9
  },
  "luminance": 0.24049
}

Semantic roles & 50–950 ramp

primary

#428EBA

secondary

#C8A590

accent

#8251D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428EBA

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

Preview Lab → · Contrast checker → · Palette generator →