#4271EC#4271EC

#4271EC is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.4% C 0.193 H 265.1°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#4271EC
RGB	rgb(66, 113, 236)
HSL	hsl(223, 82%, 59%)
HSV	hsv(223, 72%, 93%)
CMYK	cmyk(72%, 52.1%, 0%, 7.5%)
CIE-LAB	lab(50.71, 25.31, -66.78)
CIE-LCH	lch(50.71, 71.42, 290.76°)
OKLab	oklab(58.42% -0.0164 -0.1922)
OKLCH	oklch(58.42% 0.193 265.1)
XYZ	xyz(23.2869, 19.0221, 81.7850)
Luminance	0.1903 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271EC #ECBD42

analogous

#42C6EC #4271EC #6842EC

triadic

#4271EC #EC4271 #71EC42

tetradic

#4271EC #EC42C6 #ECBD42 #42EC68

square

#4271EC #EC42C6 #ECBD42 #42EC68

split-complementary

#4271EC #EC6842 #C6EC42

monochromatic

#1039A3 #164CDB #4271EC #7A9BF2 #B1C5F7

Accessibility & contrast

On white

4.37

#4271EC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#4271EC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271EC

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271EC	#FFFFFF	#000000	##000000
##4271EC	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A81F0

Deuteranopia (green-blind)

#0071EA

Tritanopia (blue-blind)

#008FA4

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4271ec;
/* rgb */ color: rgb(66, 113, 236);
/* oklch */ color: oklch(58.4% 0.193 265.1);

Tailwind

colors: {
  custom: {
    50: '#8b99f3',
    500: '#4271ec',
    950: '#000000',
  },
}

SCSS

$custom: #4271ec;
$custom-light: #8b99f3;
$custom-dark: #000000;

JSON

{
  "hex": "#4271ec",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 236
  },
  "hsl": {
    "h": 223.412,
    "s": 81.731,
    "l": 59.216
  },
  "oklch": {
    "l": 0.58418,
    "c": 0.19288,
    "h": 265.1
  },
  "luminance": 0.19025
}

Semantic roles & 50–950 ramp

primary

#4271EC

secondary

#E6D4A4

accent

#C130F8

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0D17

muted

#7E7E85

Preview Lab

Preview with #4271EC

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

Preview Lab → · Contrast checker → · Palette generator →