#427BD8#427BD8

#427BD8 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.1% C 0.155 H 259.7°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#427BD8
RGB	rgb(66, 123, 216)
HSL	hsl(217, 66%, 55%)
HSV	hsv(217, 69%, 85%)
CMYK	cmyk(69.4%, 43.1%, 0%, 15.3%)
CIE-LAB	lab(52.15, 11.93, -53.22)
CIE-LCH	lch(52.15, 54.54, 282.63°)
OKLab	oklab(59.12% -0.0276 -0.1521)
OKLCH	oklch(59.12% 0.155 259.7)
XYZ	xyz(21.7199, 20.2798, 67.7221)
Luminance	0.2028 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BD8 #D89F42

analogous

#42C6D8 #427BD8 #5442D8

triadic

#427BD8 #D8427B #7BD842

tetradic

#427BD8 #D842C6 #D89F42 #42D854

square

#427BD8 #D842C6 #D89F42 #42D854

split-complementary

#427BD8 #D85442 #C6D842

monochromatic

#1B4384 #265DB7 #427BD8 #759EE2 #A7C2ED

Accessibility & contrast

On white

4.15

#427BD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#427BD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BD8

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BD8	#FFFFFF	#000000	##000000
##427BD8	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E84DC

Deuteranopia (green-blind)

#3476D6

Tritanopia (blue-blind)

#00919F

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #427bd8;
/* rgb */ color: rgb(66, 123, 216);
/* oklch */ color: oklch(59.1% 0.155 259.7);

Tailwind

colors: {
  custom: {
    50: '#87a0e4',
    500: '#427bd8',
    950: '#000000',
  },
}

SCSS

$custom: #427bd8;
$custom-light: #87a0e4;
$custom-dark: #000000;

JSON

{
  "hex": "#427bd8",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 216
  },
  "hsl": {
    "h": 217.2,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.59116,
    "c": 0.15461,
    "h": 259.7
  },
  "luminance": 0.20282
}

Semantic roles & 50–950 ramp

primary

#427BD8

secondary

#DAC29C

accent

#A83FE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #427BD8

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

Preview Lab → · Contrast checker → · Palette generator →