#427EB3#427EB3

#427EB3 is a mid, moderate cyan. Relative luminance 0.193; OKLCH L 57.6% C 0.103 H 247.3°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#427EB3
RGB	rgb(66, 126, 179)
HSL	hsl(208, 46%, 48%)
HSV	hsv(208, 63%, 70%)
CMYK	cmyk(63.1%, 29.6%, 0%, 29.8%)
CIE-LAB	lab(51.07, -2.83, -33.80)
CIE-LCH	lch(51.07, 33.92, 265.22°)
OKLab	oklab(57.64% -0.0398 -0.0953)
OKLCH	oklch(57.64% 0.103 247.3)
XYZ	xyz(17.8413, 19.3329, 45.4305)
Luminance	0.1933 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427EB3 #B37742

analogous

#42B3AF #427EB3 #4245B3

triadic

#427EB3 #B3427E #7EB342

tetradic

#427EB3 #AF42B3 #B37742 #45B342

square

#427EB3 #AF42B3 #B37742 #45B342

split-complementary

#427EB3 #B34245 #B3AF42

monochromatic

#213F5A #325F86 #427EB3 #6A9CC8 #97BAD9

Accessibility & contrast

On white

4.31

#427EB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#427EB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427EB3

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427EB3	#FFFFFF	#000000	##000000
##427EB3	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B5

Deuteranopia (green-blind)

#5875B2

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #427eb3;
/* rgb */ color: rgb(66, 126, 179);
/* oklch */ color: oklch(57.6% 0.103 247.3);

Tailwind

colors: {
  custom: {
    50: '#81a3ca',
    500: '#427eb3',
    950: '#000000',
  },
}

SCSS

$custom: #427eb3;
$custom-light: #81a3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#427eb3",
  "rgb": {
    "r": 66,
    "g": 126,
    "b": 179
  },
  "hsl": {
    "h": 208.142,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.57644,
    "c": 0.10329,
    "h": 247.3
  },
  "luminance": 0.19335
}

Semantic roles & 50–950 ramp

primary

#427EB3

secondary

#C4A78C

accent

#9052D6

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #427EB3

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

Preview Lab → · Contrast checker → · Palette generator →