#4271D4#4271D4

#4271D4 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.7% C 0.161 H 263.1°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#4271D4
RGB	rgb(66, 113, 212)
HSL	hsl(221, 63%, 55%)
HSV	hsv(221, 69%, 83%)
CMYK	cmyk(68.9%, 46.7%, 0%, 16.9%)
CIE-LAB	lab(49.15, 16.71, -55.75)
CIE-LCH	lch(49.15, 58.21, 286.69°)
OKLab	oklab(56.73% -0.0192 -0.1597)
OKLCH	oklch(56.73% 0.161 263.1)
XYZ	xyz(20.0314, 17.7199, 64.6392)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D4 #D4A542

analogous

#42BAD4 #4271D4 #5C42D4

triadic

#4271D4 #D44271 #71D442

tetradic

#4271D4 #D442BA #D4A542 #42D45C

square

#4271D4 #D442BA #D4A542 #42D45C

split-complementary

#4271D4 #D45C42 #BAD442

monochromatic

#1D3C7F #2854B1 #4271D4 #7496DF #A6BCEB

Accessibility & contrast

On white

4.62

#4271D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#4271D4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4271D4

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D4	#FFFFFF	#000000	##FFFFFF
##4271D4	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D7CD8

Deuteranopia (green-blind)

#1D6FD2

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4271d4;
/* rgb */ color: rgb(66, 113, 212);
/* oklch */ color: oklch(56.7% 0.161 263.1);

Tailwind

colors: {
  custom: {
    50: '#8799e2',
    500: '#4271d4',
    950: '#000000',
  },
}

SCSS

$custom: #4271d4;
$custom-light: #8799e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d4",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 212
  },
  "hsl": {
    "h": 220.685,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.56732,
    "c": 0.16089,
    "h": 263.1
  },
  "luminance": 0.17722
}

Semantic roles & 50–950 ramp

primary

#4271D4

secondary

#D8C49A

accent

#B142E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0D15

muted

#7D7E83

Preview Lab

Preview with #4271D4

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

Preview Lab → · Contrast checker → · Palette generator →