#4271DF#4271DF

#4271DF is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.5% C 0.176 H 264.2°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#4271DF
RGB	rgb(66, 113, 223)
HSL	hsl(222, 71%, 57%)
HSV	hsv(222, 70%, 87%)
CMYK	cmyk(70.4%, 49.3%, 0%, 12.5%)
CIE-LAB	lab(49.85, 20.65, -60.87)
CIE-LCH	lch(49.85, 64.27, 288.74°)
OKLab	oklab(57.49% -0.0177 -0.1748)
OKLCH	oklch(57.49% 0.176 264.2)
XYZ	xyz(21.4665, 18.2940, 72.1975)
Luminance	0.1830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271DF #DFB042

analogous

#42C0DF #4271DF #6242DF

triadic

#4271DF #DF4271 #71DF42

tetradic

#4271DF #DF42C0 #DFB042 #42DF62

square

#4271DF #DF42C0 #DFB042 #42DF62

split-complementary

#4271DF #DF6242 #C0DF42

monochromatic

#183C8E #2151C3 #4271DF #7698E8 #ABC0F1

Accessibility & contrast

On white

4.51

#4271DF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#4271DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271DF

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271DF	#FFFFFF	#000000	##000000
##4271DF	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#317EE3

Deuteranopia (green-blind)

#0070DD

Tritanopia (blue-blind)

#008B9D

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4271df;
/* rgb */ color: rgb(66, 113, 223);
/* oklch */ color: oklch(57.5% 0.176 264.2);

Tailwind

colors: {
  custom: {
    50: '#8999ea',
    500: '#4271df',
    950: '#000000',
  },
}

SCSS

$custom: #4271df;
$custom-light: #8999ea;
$custom-dark: #000000;

JSON

{
  "hex": "#4271df",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 223
  },
  "hsl": {
    "h": 222.038,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.57487,
    "c": 0.17568,
    "h": 264.2
  },
  "luminance": 0.18296
}

Semantic roles & 50–950 ramp

primary

#4271DF

secondary

#DFCB9E

accent

#B83AEE

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4271DF

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

Preview Lab → · Contrast checker → · Palette generator →