#427F99#427F99

#427F99 is a mid, moderate cyan. Relative luminance 0.186; OKLCH L 56.6% C 0.075 H 228.0°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#427F99
RGB	rgb(66, 127, 153)
HSL	hsl(198, 40%, 43%)
HSV	hsv(198, 57%, 60%)
CMYK	cmyk(56.9%, 17%, 0%, 40%)
CIE-LAB	lab(50.26, -11.93, -19.98)
CIE-LCH	lch(50.26, 23.27, 239.15°)
OKLab	oklab(56.63% -0.05 -0.0556)
OKLCH	oklch(56.63% 0.075 228)
XYZ	xyz(15.5837, 18.6355, 32.9066)
Luminance	0.1864 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427F99 #995C42

analogous

#429987 #427F99 #425399

triadic

#427F99 #99427F #7F9942

tetradic

#427F99 #874299 #995C42 #539942

square

#427F99 #874299 #995C42 #539942

split-complementary

#427F99 #994253 #998742

monochromatic

#1D3843 #305C6E #427F99 #5E9EBA #89B8CC

Accessibility & contrast

On white

4.44

#427F99 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#427F99 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427F99

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427F99	#FFFFFF	#000000	##000000
##427F99	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#717D9A

Deuteranopia (green-blind)

#657499

Tritanopia (blue-blind)

#008687

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #427f99;
/* rgb */ color: rgb(66, 127, 153);
/* oklch */ color: oklch(56.6% 0.075 228.0);

Tailwind

colors: {
  custom: {
    50: '#7ea4b7',
    500: '#427f99',
    950: '#000000',
  },
}

SCSS

$custom: #427f99;
$custom-light: #7ea4b7;
$custom-dark: #000000;

JSON

{
  "hex": "#427f99",
  "rgb": {
    "r": 66,
    "g": 127,
    "b": 153
  },
  "hsl": {
    "h": 197.931,
    "s": 39.726,
    "l": 42.941
  },
  "oklch": {
    "l": 0.56628,
    "c": 0.07477,
    "h": 228
  },
  "luminance": 0.18637
}

Semantic roles & 50–950 ramp

primary

#427F99

secondary

#B79080

accent

#7C58D0

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #427F99

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

Preview Lab → · Contrast checker → · Palette generator →