#428BB2#428BB2

#428BB2 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.7% C 0.094 H 234.6°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#428BB2
RGB	rgb(66, 139, 178)
HSL	hsl(201, 46%, 48%)
HSV	hsv(201, 63%, 70%)
CMYK	cmyk(62.9%, 21.9%, 0%, 30.2%)
CIE-LAB	lab(54.90, -10.66, -27.27)
CIE-LCH	lch(54.90, 29.28, 248.65°)
OKLab	oklab(60.66% -0.0543 -0.0764)
OKLCH	oklch(60.66% 0.094 234.6)
XYZ	xyz(19.5122, 22.8359, 45.4903)
Luminance	0.2284 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BB2 #B26942

analogous

#42B2A1 #428BB2 #4253B2

triadic

#428BB2 #B2428B #8BB242

tetradic

#428BB2 #A142B2 #B26942 #53B242

square

#428BB2 #A142B2 #B26942 #53B242

split-complementary

#428BB2 #B24253 #B2A142

monochromatic

#214559 #316885 #428BB2 #6AA7C8 #96C1D8

Accessibility & contrast

On white

3.77

#428BB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#428BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BB2

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BB2	#FFFFFF	#000000	##000000
##428BB2	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)

#788AB4

Deuteranopia (green-blind)

#697EB1

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428bb2;
/* rgb */ color: rgb(66, 139, 178);
/* oklch */ color: oklch(60.7% 0.094 234.6);

Tailwind

colors: {
  custom: {
    50: '#81acc9',
    500: '#428bb2',
    950: '#000000',
  },
}

SCSS

$custom: #428bb2;
$custom-light: #81acc9;
$custom-dark: #000000;

JSON

{
  "hex": "#428bb2",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 178
  },
  "hsl": {
    "h": 200.893,
    "s": 45.902,
    "l": 47.843
  },
  "oklch": {
    "l": 0.60659,
    "c": 0.09368,
    "h": 234.6
  },
  "luminance": 0.22838
}

Semantic roles & 50–950 ramp

primary

#428BB2

secondary

#C49F8C

accent

#8052D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428BB2

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

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