#427BBB#427BBB

#427BBB is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.4% C 0.116 H 252.8°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#427BBB
RGB	rgb(66, 123, 187)
HSL	hsl(212, 48%, 50%)
HSV	hsv(212, 65%, 73%)
CMYK	cmyk(64.7%, 34.2%, 0%, 26.7%)
CIE-LAB	lab(50.58, 1.71, -39.18)
CIE-LCH	lch(50.58, 39.22, 272.49°)
OKLab	oklab(57.38% -0.0343 -0.111)
OKLCH	oklch(57.38% 0.116 252.8)
XYZ	xyz(18.2961, 18.9102, 49.6899)
Luminance	0.1891 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BBB #BB8242

analogous

#42B7BB #427BBB #4642BB

triadic

#427BBB #BB427B #7BBB42

tetradic

#427BBB #BB42B7 #BB8242 #42BB46

square

#427BBB #BB42B7 #BB8242 #42BB46

split-complementary

#427BBB #BB4642 #B7BB42

monochromatic

#223F61 #325D8E #427BBB #6E9ACC #9CBADC

Accessibility & contrast

On white

4.39

#427BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#427BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BBB

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BBB	#FFFFFF	#000000	##000000
##427BBB	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7FBE

Deuteranopia (green-blind)

#4F73BA

Tritanopia (blue-blind)

#008A92

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #427bbb;
/* rgb */ color: rgb(66, 123, 187);
/* oklch */ color: oklch(57.4% 0.116 252.8);

Tailwind

colors: {
  custom: {
    50: '#82a0d0',
    500: '#427bbb',
    950: '#000000',
  },
}

SCSS

$custom: #427bbb;
$custom-light: #82a0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#427bbb",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 187
  },
  "hsl": {
    "h": 211.736,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.57384,
    "c": 0.11617,
    "h": 252.8
  },
  "luminance": 0.18912
}

Semantic roles & 50–950 ramp

primary

#427BBB

secondary

#C8AE91

accent

#9850D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #427BBB

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

Preview Lab → · Contrast checker → · Palette generator →