#427FE3#427FE3

#427FE3 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.7% C 0.165 H 259.8°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#427FE3
RGB	rgb(66, 127, 227)
HSL	hsl(217, 74%, 57%)
HSV	hsv(217, 71%, 89%)
CMYK	cmyk(70.9%, 44.1%, 0%, 11%)
CIE-LAB	lab(53.90, 13.40, -56.61)
CIE-LCH	lch(53.90, 58.17, 283.32°)
OKLab	oklab(60.67% -0.0292 -0.162)
OKLCH	oklch(60.67% 0.165 259.8)
XYZ	xyz(23.6963, 21.8805, 75.6327)
Luminance	0.2188 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427FE3 #E3A642

analogous

#42D0E3 #427FE3 #5542E3

triadic

#427FE3 #E3427F #7FE342

tetradic

#427FE3 #E342D0 #E3A642 #42E355

square

#427FE3 #E342D0 #E3A642 #42E355

split-complementary

#427FE3 #E35542 #D0E342

monochromatic

#164695 #1E5FCA #427FE3 #77A3EB #ADC7F3

Accessibility & contrast

On white

3.91

#427FE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#427FE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427FE3

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427FE3	#FFFFFF	#000000	##000000
##427FE3	1.00	3.91	5.38	5.38
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D89E7

Deuteranopia (green-blind)

#2E7AE1

Tritanopia (blue-blind)

#0096A6

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #427fe3;
/* rgb */ color: rgb(66, 127, 227);
/* oklch */ color: oklch(60.7% 0.165 259.8);

Tailwind

colors: {
  custom: {
    50: '#89a3ec',
    500: '#427fe3',
    950: '#000000',
  },
}

SCSS

$custom: #427fe3;
$custom-light: #89a3ec;
$custom-dark: #000000;

JSON

{
  "hex": "#427fe3",
  "rgb": {
    "r": 66,
    "g": 127,
    "b": 227
  },
  "hsl": {
    "h": 217.267,
    "s": 74.194,
    "l": 57.451
  },
  "oklch": {
    "l": 0.60673,
    "c": 0.16463,
    "h": 259.8
  },
  "luminance": 0.21883
}

Semantic roles & 50–950 ramp

primary

#427FE3

secondary

#E1C8A0

accent

#AA37F1

background

#F9FAFE

surface

#F1F3FD

border

#CBCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #427FE3

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

Preview Lab → · Contrast checker → · Palette generator →