#427CCB#427CCB

#427CCB is a mid, vivid cyan. Relative luminance 0.199; OKLCH L 58.5% C 0.136 H 256.7°. Best body text is #000000 at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#427CCB
RGB	rgb(66, 124, 203)
HSL	hsl(215, 57%, 53%)
HSV	hsv(215, 67%, 80%)
CMYK	cmyk(67.5%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(51.70, 6.70, -46.56)
CIE-LCH	lch(51.70, 47.04, 278.19°)
OKLab	oklab(58.53% -0.0313 -0.1326)
OKLCH	oklch(58.53% 0.136 256.7)
XYZ	xyz(20.2300, 19.8833, 59.2601)
Luminance	0.1988 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427CCB #CB9142

analogous

#42C0CB #427CCB #4D42CB

triadic

#427CCB #CB427C #7CCB42

tetradic

#427CCB #CB42C0 #CB9142 #42CB4D

square

#427CCB #CB42C0 #CB9142 #42CB4D

split-complementary

#427CCB #CB4D42 #C0CB42

monochromatic

#204373 #2D5FA3 #427CCB #729DD8 #A2BFE5

Accessibility & contrast

On white

4.22

#427CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.98

#427CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427CCB

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427CCB	#FFFFFF	#000000	##000000
##427CCB	1.00	4.22	4.98	4.98
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.98	21.00	1.00	1.00
##000000	4.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5882CE

Deuteranopia (green-blind)

#4475C9

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #427ccb;
/* rgb */ color: rgb(66, 124, 203);
/* oklch */ color: oklch(58.5% 0.136 256.7);

Tailwind

colors: {
  custom: {
    50: '#85a1db',
    500: '#427ccb',
    950: '#000000',
  },
}

SCSS

$custom: #427ccb;
$custom-light: #85a1db;
$custom-dark: #000000;

JSON

{
  "hex": "#427ccb",
  "rgb": {
    "r": 66,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 214.599,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.58533,
    "c": 0.1362,
    "h": 256.7
  },
  "luminance": 0.19885
}

Semantic roles & 50–950 ramp

primary

#427CCB

secondary

#D2B997

accent

#A048E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #427CCB

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

Preview Lab → · Contrast checker → · Palette generator →