#427BCB#427BCB

#427BCB is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.3% C 0.137 H 257.2°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#427BCB
RGB	rgb(66, 123, 203)
HSL	hsl(215, 57%, 53%)
HSV	hsv(215, 67%, 80%)
CMYK	cmyk(67.5%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(51.42, 7.31, -47.01)
CIE-LCH	lch(51.42, 47.58, 278.84°)
OKLab	oklab(58.31% -0.0303 -0.1339)
OKLCH	oklch(58.31% 0.137 257.2)
XYZ	xyz(20.1053, 19.6339, 59.2185)
Luminance	0.1964 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BCB #CB9242

analogous

#42C0CB #427BCB #4D42CB

triadic

#427BCB #CB427B #7BCB42

tetradic

#427BCB #CB42C0 #CB9242 #42CB4D

square

#427BCB #CB42C0 #CB9242 #42CB4D

split-complementary

#427BCB #CB4D42 #C0CB42

monochromatic

#204273 #2D5EA3 #427BCB #729DD8 #A2BEE5

Accessibility & contrast

On white

4.26

#427BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#427BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BCB

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BCB	#FFFFFF	#000000	##000000
##427BCB	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5781CE

Deuteranopia (green-blind)

#4275C9

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #427bcb;
/* rgb */ color: rgb(66, 123, 203);
/* oklch */ color: oklch(58.3% 0.137 257.2);

Tailwind

colors: {
  custom: {
    50: '#85a0db',
    500: '#427bcb',
    950: '#000000',
  },
}

SCSS

$custom: #427bcb;
$custom-light: #85a0db;
$custom-dark: #000000;

JSON

{
  "hex": "#427bcb",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 215.036,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.58312,
    "c": 0.13729,
    "h": 257.2
  },
  "luminance": 0.19636
}

Semantic roles & 50–950 ramp

primary

#427BCB

secondary

#D2B997

accent

#A148E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #427BCB

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

Preview Lab → · Contrast checker → · Palette generator →