#427BB3#427BB3

#427BB3 is a mid, moderate cyan. Relative luminance 0.186; OKLCH L 56.9% C 0.106 H 249.8°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#427BB3
RGB	rgb(66, 123, 179)
HSL	hsl(210, 46%, 48%)
HSV	hsv(210, 63%, 70%)
CMYK	cmyk(63.1%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(50.19, -1.05, -35.19)
CIE-LCH	lch(50.19, 35.21, 268.30°)
OKLab	oklab(56.95% -0.0365 -0.0994)
OKLCH	oklch(56.95% 0.106 249.8)
XYZ	xyz(17.4634, 18.5772, 45.3045)
Luminance	0.1858 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BB3 #B37A42

analogous

#42B3B2 #427BB3 #4242B3

triadic

#427BB3 #B3427B #7BB342

tetradic

#427BB3 #B242B3 #B37A42 #42B342

square

#427BB3 #B242B3 #B37A42 #42B342

split-complementary

#427BB3 #B34242 #B3B242

monochromatic

#213E5A #325C86 #427BB3 #6A9AC8 #97B8D9

Accessibility & contrast

On white

4.45

#427BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#427BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BB3

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BB3	#FFFFFF	#000000	##000000
##427BB3	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB5

Deuteranopia (green-blind)

#5472B2

Tritanopia (blue-blind)

#00888F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #427bb3;
/* rgb */ color: rgb(66, 123, 179);
/* oklch */ color: oklch(56.9% 0.106 249.8);

Tailwind

colors: {
  custom: {
    50: '#81a0ca',
    500: '#427bb3',
    950: '#000000',
  },
}

SCSS

$custom: #427bb3;
$custom-light: #81a0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#427bb3",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 209.735,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.56947,
    "c": 0.10589,
    "h": 249.8
  },
  "luminance": 0.18579
}

Semantic roles & 50–950 ramp

primary

#427BB3

secondary

#C4A88C

accent

#9352D6

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #427BB3

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

Preview Lab → · Contrast checker → · Palette generator →