#428BA5#428BA5

#428BA5 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.1% C 0.082 H 224.1°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#428BA5
RGB	rgb(66, 139, 165)
HSL	hsl(196, 43%, 45%)
HSV	hsv(196, 60%, 65%)
CMYK	cmyk(60%, 15.8%, 0%, 35.3%)
CIE-LAB	lab(54.38, -14.83, -20.61)
CIE-LCH	lch(54.38, 25.39, 234.27°)
OKLab	oklab(60.07% -0.0591 -0.0574)
OKLCH	oklch(60.07% 0.082 224.1)
XYZ	xyz(18.2683, 22.3383, 38.9390)
Luminance	0.2234 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BA5 #A55C42

analogous

#42A58E #428BA5 #4259A5

triadic

#428BA5 #A5428B #8BA542

tetradic

#428BA5 #8E42A5 #A55C42 #59A542

square

#428BA5 #8E42A5 #A55C42 #59A542

split-complementary

#428BA5 #A54259 #A58E42

monochromatic

#1F414E #316679 #428BA5 #63A8C1 #8FC1D2

Accessibility & contrast

On white

3.84

#428BA5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#428BA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BA5

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BA5	#FFFFFF	#000000	##000000
##428BA5	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C88A6

Deuteranopia (green-blind)

#6E7DA5

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #428ba5;
/* rgb */ color: rgb(66, 139, 165);
/* oklch */ color: oklch(60.1% 0.082 224.1);

Tailwind

colors: {
  custom: {
    50: '#80adbf',
    500: '#428ba5',
    950: '#000000',
  },
}

SCSS

$custom: #428ba5;
$custom-light: #80adbf;
$custom-dark: #000000;

JSON

{
  "hex": "#428ba5",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 165
  },
  "hsl": {
    "h": 195.758,
    "s": 42.857,
    "l": 45.294
  },
  "oklch": {
    "l": 0.60074,
    "c": 0.08238,
    "h": 224.1
  },
  "luminance": 0.2234
}

Semantic roles & 50–950 ramp

primary

#428BA5

secondary

#BD9485

accent

#7655D3

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428BA5

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

Preview Lab → · Contrast checker → · Palette generator →