#4271D7#4271D7

#4271D7 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.9% C 0.165 H 263.5°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#4271D7
RGB	rgb(66, 113, 215)
HSL	hsl(221, 65%, 55%)
HSV	hsv(221, 69%, 84%)
CMYK	cmyk(69.3%, 47.4%, 0%, 15.7%)
CIE-LAB	lab(49.34, 17.79, -57.16)
CIE-LCH	lch(49.34, 59.86, 287.28°)
OKLab	oklab(56.94% -0.0188 -0.1639)
OKLCH	oklch(56.94% 0.165 263.5)
XYZ	xyz(20.4133, 17.8727, 66.6508)
Luminance	0.1787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D7 #D7A842

analogous

#42BBD7 #4271D7 #5D42D7

triadic

#4271D7 #D74271 #71D742

tetradic

#4271D7 #D742BB #D7A842 #42D75D

square

#4271D7 #D742BB #D7A842 #42D75D

split-complementary

#4271D7 #D75D42 #BBD742

monochromatic

#1C3C83 #2654B5 #4271D7 #7597E2 #A7BDEC

Accessibility & contrast

On white

4.59

#4271D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#4271D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4271D7

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D7	#FFFFFF	#000000	##FFFFFF
##4271D7	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A7DDB

Deuteranopia (green-blind)

#146FD5

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4271d7;
/* rgb */ color: rgb(66, 113, 215);
/* oklch */ color: oklch(56.9% 0.165 263.5);

Tailwind

colors: {
  custom: {
    50: '#8799e4',
    500: '#4271d7',
    950: '#000000',
  },
}

SCSS

$custom: #4271d7;
$custom-light: #8799e4;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d7",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 215
  },
  "hsl": {
    "h": 221.074,
    "s": 65.066,
    "l": 55.098
  },
  "oklch": {
    "l": 0.56935,
    "c": 0.16494,
    "h": 263.5
  },
  "luminance": 0.17875
}

Semantic roles & 50–950 ramp

primary

#4271D7

secondary

#DAC69B

accent

#B340E8

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4271D7

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

Preview Lab → · Contrast checker → · Palette generator →