#427CD8#427CD8

#427CD8 is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.3% C 0.153 H 259.3°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#427CD8
RGB	rgb(66, 124, 216)
HSL	hsl(217, 66%, 55%)
HSV	hsv(217, 69%, 85%)
CMYK	cmyk(69.4%, 42.6%, 0%, 15.3%)
CIE-LAB	lab(52.43, 11.31, -52.77)
CIE-LCH	lch(52.43, 53.97, 282.10°)
OKLab	oklab(59.33% -0.0285 -0.1508)
OKLCH	oklch(59.33% 0.153 259.3)
XYZ	xyz(21.8446, 20.5291, 67.7637)
Luminance	0.2053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427CD8 #D89E42

analogous

#42C7D8 #427CD8 #5342D8

triadic

#427CD8 #D8427C #7CD842

tetradic

#427CD8 #D842C7 #D89E42 #42D853

square

#427CD8 #D842C7 #D89E42 #42D853

split-complementary

#427CD8 #D85342 #C7D842

monochromatic

#1B4484 #265EB7 #427CD8 #759FE2 #A7C2ED

Accessibility & contrast

On white

4.11

#427CD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#427CD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427CD8

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427CD8	#FFFFFF	#000000	##000000
##427CD8	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5085DC

Deuteranopia (green-blind)

#3677D6

Tritanopia (blue-blind)

#00919F

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #427cd8;
/* rgb */ color: rgb(66, 124, 216);
/* oklch */ color: oklch(59.3% 0.153 259.3);

Tailwind

colors: {
  custom: {
    50: '#87a1e4',
    500: '#427cd8',
    950: '#000000',
  },
}

SCSS

$custom: #427cd8;
$custom-light: #87a1e4;
$custom-dark: #000000;

JSON

{
  "hex": "#427cd8",
  "rgb": {
    "r": 66,
    "g": 124,
    "b": 216
  },
  "hsl": {
    "h": 216.8,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.59331,
    "c": 0.15348,
    "h": 259.3
  },
  "luminance": 0.20531
}

Semantic roles & 50–950 ramp

primary

#427CD8

secondary

#DAC29C

accent

#A73FE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #427CD8

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

Preview Lab → · Contrast checker → · Palette generator →