#428FB6#428FB6

#428FB6 is a mid, moderate cyan. Relative luminance 0.242; OKLCH L 61.8% C 0.096 H 233.4°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#428FB6
RGB	rgb(66, 143, 182)
HSL	hsl(200, 47%, 49%)
HSV	hsv(200, 64%, 71%)
CMYK	cmyk(63.7%, 21.4%, 0%, 28.6%)
CIE-LAB	lab(56.27, -11.59, -27.44)
CIE-LCH	lch(56.27, 29.79, 247.10°)
OKLab	oklab(61.8% -0.0571 -0.0768)
OKLCH	oklch(61.8% 0.096 233.4)
XYZ	xyz(20.5095, 24.1785, 47.8330)
Luminance	0.2418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FB6 #B66942

analogous

#42B6A3 #428FB6 #4255B6

triadic

#428FB6 #B6428F #8FB642

tetradic

#428FB6 #A342B6 #B66942 #55B642

square

#428FB6 #A342B6 #B66942 #55B642

split-complementary

#428FB6 #B64255 #B6A342

monochromatic

#21485C #326C89 #428FB6 #6CAACA #99C4DA

Accessibility & contrast

On white

3.60

#428FB6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#428FB6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FB6

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FB6	#FFFFFF	#000000	##000000
##428FB6	1.00	3.60	5.84	5.84
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8EB8

Deuteranopia (green-blind)

#6C82B5

Tritanopia (blue-blind)

#00999C

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428fb6;
/* rgb */ color: rgb(66, 143, 182);
/* oklch */ color: oklch(61.8% 0.096 233.4);

Tailwind

colors: {
  custom: {
    50: '#82afcc',
    500: '#428fb6',
    950: '#000000',
  },
}

SCSS

$custom: #428fb6;
$custom-light: #82afcc;
$custom-dark: #000000;

JSON

{
  "hex": "#428fb6",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 182
  },
  "hsl": {
    "h": 200.172,
    "s": 46.774,
    "l": 48.627
  },
  "oklch": {
    "l": 0.61797,
    "c": 0.09576,
    "h": 233.4
  },
  "luminance": 0.24181
}

Semantic roles & 50–950 ramp

primary

#428FB6

secondary

#C6A18E

accent

#7E51D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428FB6

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

Preview Lab → · Contrast checker → · Palette generator →