#427FCB#427FCB

#427FCB is a mid, vivid cyan. Relative luminance 0.206; OKLCH L 59.2% C 0.133 H 255.1°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#427FCB
RGB	rgb(66, 127, 203)
HSL	hsl(213, 57%, 53%)
HSV	hsv(213, 67%, 80%)
CMYK	cmyk(67.5%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(52.56, 4.88, -45.20)
CIE-LCH	lch(52.56, 45.46, 276.16°)
OKLab	oklab(59.2% -0.0342 -0.1285)
OKLCH	oklch(59.2% 0.133 255.1)
XYZ	xyz(20.6117, 20.6467, 59.3873)
Luminance	0.2065 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427FCB #CB8E42

analogous

#42C3CB #427FCB #4A42CB

triadic

#427FCB #CB427F #7FCB42

tetradic

#427FCB #CB42C3 #CB8E42 #42CB4A

square

#427FCB #CB42C3 #CB8E42 #42CB4A

split-complementary

#427FCB #CB4A42 #C3CB42

monochromatic

#204573 #2D61A3 #427FCB #72A0D8 #A2C0E5

Accessibility & contrast

On white

4.09

#427FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#427FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427FCB

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427FCB	#FFFFFF	#000000	##000000
##427FCB	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D84CE

Deuteranopia (green-blind)

#4978C9

Tritanopia (blue-blind)

#00919B

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #427fcb;
/* rgb */ color: rgb(66, 127, 203);
/* oklch */ color: oklch(59.2% 0.133 255.1);

Tailwind

colors: {
  custom: {
    50: '#85a3db',
    500: '#427fcb',
    950: '#000000',
  },
}

SCSS

$custom: #427fcb;
$custom-light: #85a3db;
$custom-dark: #000000;

JSON

{
  "hex": "#427fcb",
  "rgb": {
    "r": 66,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 213.285,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.592,
    "c": 0.13301,
    "h": 255.1
  },
  "luminance": 0.20649
}

Semantic roles & 50–950 ramp

primary

#427FCB

secondary

#D2B897

accent

#9C48E0

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #427FCB

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

Preview Lab → · Contrast checker → · Palette generator →