#427BCF#427BCF

#427BCF is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.6% C 0.143 H 258.1°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#427BCF
RGB	rgb(66, 123, 207)
HSL	hsl(216, 59%, 54%)
HSV	hsv(216, 68%, 81%)
CMYK	cmyk(68.1%, 40.6%, 0%, 18.8%)
CIE-LAB	lab(51.64, 8.73, -48.93)
CIE-LCH	lch(51.64, 49.71, 280.11°)
OKLab	oklab(58.56% -0.0294 -0.1395)
OKLCH	oklch(58.56% 0.143 258.1)
XYZ	xyz(20.5881, 19.8271, 61.7614)
Luminance	0.1983 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BCF #CF9642

analogous

#42C1CF #427BCF #4F42CF

triadic

#427BCF #CF427B #7BCF42

tetradic

#427BCF #CF42C1 #CF9642 #42CF4F

square

#427BCF #CF42C1 #CF9642 #42CF4F

split-complementary

#427BCF #CF4F42 #C1CF42

monochromatic

#1F4378 #2B5EA9 #427BCF #739DDB #A4BFE8

Accessibility & contrast

On white

4.23

#427BCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#427BCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BCF

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BCF	#FFFFFF	#000000	##000000
##427BCF	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5482D2

Deuteranopia (green-blind)

#3E75CD

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #427bcf;
/* rgb */ color: rgb(66, 123, 207);
/* oklch */ color: oklch(58.6% 0.143 258.1);

Tailwind

colors: {
  custom: {
    50: '#85a0de',
    500: '#427bcf',
    950: '#000000',
  },
}

SCSS

$custom: #427bcf;
$custom-light: #85a0de;
$custom-dark: #000000;

JSON

{
  "hex": "#427bcf",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 207
  },
  "hsl": {
    "h": 215.745,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.58555,
    "c": 0.14261,
    "h": 258.1
  },
  "luminance": 0.19829
}

Semantic roles & 50–950 ramp

primary

#427BCF

secondary

#D5BC98

accent

#A345E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #427BCF

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

Preview Lab → · Contrast checker → · Palette generator →