#4271EA#4271EA

#4271EA is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.3% C 0.190 H 265.0°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4271EA
RGB	rgb(66, 113, 234)
HSL	hsl(223, 80%, 59%)
HSV	hsv(223, 72%, 92%)
CMYK	cmyk(71.8%, 51.7%, 0%, 8.2%)
CIE-LAB	lab(50.58, 24.60, -65.88)
CIE-LCH	lch(50.58, 70.32, 290.47°)
OKLab	oklab(58.27% -0.0165 -0.1895)
OKLCH	oklch(58.27% 0.19 265)
XYZ	xyz(22.9979, 18.9066, 80.2632)
Luminance	0.1891 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271EA #EABB42

analogous

#42C5EA #4271EA #6742EA

triadic

#4271EA #EA4271 #71EA42

tetradic

#4271EA #EA42C5 #EABB42 #42EA67

square

#4271EA #EA42C5 #EABB42 #42EA67

split-complementary

#4271EA #EA6742 #C5EA42

monochromatic

#123AA0 #184DD7 #4271EA #799AF0 #B0C4F6

Accessibility & contrast

On white

4.39

#4271EA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#4271EA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271EA

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271EA	#FFFFFF	#000000	##000000
##4271EA	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F81EE

Deuteranopia (green-blind)

#0071E8

Tritanopia (blue-blind)

#008EA3

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4271ea;
/* rgb */ color: rgb(66, 113, 234);
/* oklch */ color: oklch(58.3% 0.190 265.0);

Tailwind

colors: {
  custom: {
    50: '#8b99f1',
    500: '#4271ea',
    950: '#000000',
  },
}

SCSS

$custom: #4271ea;
$custom-light: #8b99f1;
$custom-dark: #000000;

JSON

{
  "hex": "#4271ea",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 234
  },
  "hsl": {
    "h": 223.214,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.58272,
    "c": 0.19025,
    "h": 265
  },
  "luminance": 0.18909
}

Semantic roles & 50–950 ramp

primary

#4271EA

secondary

#E5D2A3

accent

#BF31F6

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0D17

muted

#7E7E85

Preview Lab

Preview with #4271EA

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

Preview Lab → · Contrast checker → · Palette generator →