#428AB3#428AB3

#428AB3 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.5% C 0.095 H 236.3°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#428AB3
RGB	rgb(66, 138, 179)
HSL	hsl(202, 46%, 48%)
HSV	hsv(202, 63%, 70%)
CMYK	cmyk(63.1%, 22.9%, 0%, 29.8%)
CIE-LAB	lab(54.65, -9.77, -28.24)
CIE-LCH	lch(54.65, 29.88, 250.92°)
OKLab	oklab(60.47% -0.0528 -0.0792)
OKLCH	oklch(60.47% 0.095 236.3)
XYZ	xyz(19.4688, 22.5879, 45.9730)
Luminance	0.2259 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AB3 #B36B42

analogous

#42B3A3 #428AB3 #4251B3

triadic

#428AB3 #B3428A #8AB342

tetradic

#428AB3 #A342B3 #B36B42 #51B342

square

#428AB3 #A342B3 #B36B42 #51B342

split-complementary

#428AB3 #B34251 #B3A342

monochromatic

#21455A #326886 #428AB3 #6AA6C8 #97C1D9

Accessibility & contrast

On white

3.81

#428AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#428AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AB3

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AB3	#FFFFFF	#000000	##000000
##428AB3	1.00	3.81	5.52	5.52
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7789B5

Deuteranopia (green-blind)

#677EB2

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ab3;
/* rgb */ color: rgb(66, 138, 179);
/* oklch */ color: oklch(60.5% 0.095 236.3);

Tailwind

colors: {
  custom: {
    50: '#81acca',
    500: '#428ab3',
    950: '#000000',
  },
}

SCSS

$custom: #428ab3;
$custom-light: #81acca;
$custom-dark: #000000;

JSON

{
  "hex": "#428ab3",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 179
  },
  "hsl": {
    "h": 201.77,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.60468,
    "c": 0.09516,
    "h": 236.3
  },
  "luminance": 0.2259
}

Semantic roles & 50–950 ramp

primary

#428AB3

secondary

#C4A18C

accent

#8252D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428AB3

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

Preview Lab → · Contrast checker → · Palette generator →