#4271D8#4271D8

#4271D8 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.0% C 0.166 H 263.6°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#4271D8
RGB	rgb(66, 113, 216)
HSL	hsl(221, 66%, 55%)
HSV	hsv(221, 69%, 85%)
CMYK	cmyk(69.4%, 47.7%, 0%, 15.3%)
CIE-LAB	lab(49.40, 18.14, -57.62)
CIE-LCH	lch(49.40, 60.41, 287.48°)
OKLab	oklab(57% -0.0186 -0.1652)
OKLCH	oklch(57% 0.166 263.6)
XYZ	xyz(20.5422, 17.9243, 67.3296)
Luminance	0.1793 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D8 #D8A942

analogous

#42BCD8 #4271D8 #5E42D8

triadic

#4271D8 #D84271 #71D842

tetradic

#4271D8 #D842BC #D8A942 #42D85E

square

#4271D8 #D842BC #D8A942 #42D85E

split-complementary

#4271D8 #D85E42 #BCD842

monochromatic

#1B3C84 #2653B7 #4271D8 #7597E2 #A7BDED

Accessibility & contrast

On white

4.58

#4271D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#4271D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271D8

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D8	#FFFFFF	#000000	##000000
##4271D8	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#397DDC

Deuteranopia (green-blind)

#116FD6

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4271d8;
/* rgb */ color: rgb(66, 113, 216);
/* oklch */ color: oklch(57.0% 0.166 263.6);

Tailwind

colors: {
  custom: {
    50: '#8799e5',
    500: '#4271d8',
    950: '#000000',
  },
}

SCSS

$custom: #4271d8;
$custom-light: #8799e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d8",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 216
  },
  "hsl": {
    "h": 221.2,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.57003,
    "c": 0.16629,
    "h": 263.6
  },
  "luminance": 0.17926
}

Semantic roles & 50–950 ramp

primary

#4271D8

secondary

#DAC79C

accent

#B43FE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4271D8

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

Preview Lab → · Contrast checker → · Palette generator →