#4271EB#4271EB

#4271EB is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.3% C 0.192 H 265.1°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#4271EB
RGB	rgb(66, 113, 235)
HSL	hsl(223, 81%, 59%)
HSV	hsv(223, 72%, 92%)
CMYK	cmyk(71.9%, 51.9%, 0%, 7.8%)
CIE-LAB	lab(50.65, 24.95, -66.33)
CIE-LCH	lch(50.65, 70.87, 290.62°)
OKLab	oklab(58.35% -0.0165 -0.1909)
OKLCH	oklch(58.35% 0.192 265.1)
XYZ	xyz(23.1420, 18.9642, 81.0220)
Luminance	0.1897 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271EB #EBBC42

analogous

#42C5EB #4271EB #6842EB

triadic

#4271EB #EB4271 #71EB42

tetradic

#4271EB #EB42C5 #EBBC42 #42EB68

square

#4271EB #EB42C5 #EBBC42 #42EB68

split-complementary

#4271EB #EB6842 #C5EB42

monochromatic

#1139A2 #174DD9 #4271EB #799BF1 #B1C4F7

Accessibility & contrast

On white

4.38

#4271EB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#4271EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271EB

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271EB	#FFFFFF	#000000	##000000
##4271EB	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C81EF

Deuteranopia (green-blind)

#0071E9

Tritanopia (blue-blind)

#008EA3

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4271eb;
/* rgb */ color: rgb(66, 113, 235);
/* oklch */ color: oklch(58.3% 0.192 265.1);

Tailwind

colors: {
  custom: {
    50: '#8b99f2',
    500: '#4271eb',
    950: '#000000',
  },
}

SCSS

$custom: #4271eb;
$custom-light: #8b99f2;
$custom-dark: #000000;

JSON

{
  "hex": "#4271eb",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 235
  },
  "hsl": {
    "h": 223.314,
    "s": 80.861,
    "l": 59.02
  },
  "oklch": {
    "l": 0.58345,
    "c": 0.19157,
    "h": 265.1
  },
  "luminance": 0.18967
}

Semantic roles & 50–950 ramp

primary

#4271EB

secondary

#E6D3A3

accent

#C031F7

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0D17

muted

#7E7E85

Preview Lab

Preview with #4271EB

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

Preview Lab → · Contrast checker → · Palette generator →