#427EA4#427EA4

#427EA4 is a mid, moderate cyan. Relative luminance 0.188; OKLCH L 56.9% C 0.086 H 238.6°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#427EA4
RGB	rgb(66, 126, 164)
HSL	hsl(203, 43%, 45%)
HSV	hsv(203, 60%, 64%)
CMYK	cmyk(59.8%, 23.2%, 0%, 35.7%)
CIE-LAB	lab(50.40, -7.83, -26.16)
CIE-LCH	lch(50.40, 27.31, 253.34°)
OKLab	oklab(56.89% -0.0448 -0.0732)
OKLCH	oklch(56.89% 0.086 238.6)
XYZ	xyz(16.4059, 18.7588, 37.8710)
Luminance	0.1876 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427EA4 #A46842

analogous

#42A499 #427EA4 #424DA4

triadic

#427EA4 #A4427E #7EA442

tetradic

#427EA4 #9942A4 #A46842 #4DA442

square

#427EA4 #9942A4 #A46842 #4DA442

split-complementary

#427EA4 #A4424D #A49942

monochromatic

#1F3B4D #305C78 #427EA4 #639CC0 #8FB8D2

Accessibility & contrast

On white

4.42

#427EA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#427EA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427EA4

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427EA4	#FFFFFF	#000000	##000000
##427EA4	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7EA6

Deuteranopia (green-blind)

#5F74A3

Tritanopia (blue-blind)

#00888B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #427ea4;
/* rgb */ color: rgb(66, 126, 164);
/* oklch */ color: oklch(56.9% 0.086 238.6);

Tailwind

colors: {
  custom: {
    50: '#7fa3bf',
    500: '#427ea4',
    950: '#000000',
  },
}

SCSS

$custom: #427ea4;
$custom-light: #7fa3bf;
$custom-dark: #000000;

JSON

{
  "hex": "#427ea4",
  "rgb": {
    "r": 66,
    "g": 126,
    "b": 164
  },
  "hsl": {
    "h": 203.265,
    "s": 42.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.56893,
    "c": 0.08585,
    "h": 238.6
  },
  "luminance": 0.1876
}

Semantic roles & 50–950 ramp

primary

#427EA4

secondary

#BD9B85

accent

#8655D2

background

#F8FAFB

surface

#EFF3F7

border

#CACDD0

text

#0B0F12

muted

#7C7F81

Preview Lab

Preview with #427EA4

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

Preview Lab → · Contrast checker → · Palette generator →