#427BC9#427BC9

#427BC9 is a mid, vivid cyan. Relative luminance 0.195; OKLCH L 58.2% C 0.135 H 256.8°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#427BC9
RGB	rgb(66, 123, 201)
HSL	hsl(215, 56%, 52%)
HSV	hsv(215, 67%, 79%)
CMYK	cmyk(67.2%, 38.8%, 0%, 21.2%)
CIE-LAB	lab(51.31, 6.60, -46.04)
CIE-LCH	lch(51.31, 46.52, 278.16°)
OKLab	oklab(58.19% -0.0307 -0.1311)
OKLCH	oklch(58.19% 0.135 256.8)
XYZ	xyz(19.8685, 19.5392, 57.9714)
Luminance	0.1954 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BC9 #C99042

analogous

#42BEC9 #427BC9 #4D42C9

triadic

#427BC9 #C9427B #7BC942

tetradic

#427BC9 #C942BE #C99042 #42C94D

square

#427BC9 #C942BE #C99042 #42C94D

split-complementary

#427BC9 #C94D42 #BEC942

monochromatic

#204270 #2E5EA0 #427BC9 #729CD7 #A1BDE4

Accessibility & contrast

On white

4.28

#427BC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#427BC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BC9

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BC9	#FFFFFF	#000000	##000000
##427BC9	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5881CC

Deuteranopia (green-blind)

#4474C7

Tritanopia (blue-blind)

#008D98

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #427bc9;
/* rgb */ color: rgb(66, 123, 201);
/* oklch */ color: oklch(58.2% 0.135 256.8);

Tailwind

colors: {
  custom: {
    50: '#84a0da',
    500: '#427bc9',
    950: '#000000',
  },
}

SCSS

$custom: #427bc9;
$custom-light: #84a0da;
$custom-dark: #000000;

JSON

{
  "hex": "#427bc9",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 201
  },
  "hsl": {
    "h": 214.667,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.58192,
    "c": 0.13462,
    "h": 256.8
  },
  "luminance": 0.19541
}

Semantic roles & 50–950 ramp

primary

#427BC9

secondary

#D1B896

accent

#A049DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #427BC9

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

Preview Lab → · Contrast checker → · Palette generator →