#4271C4#4271C4

#4271C4 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.7% C 0.139 H 260.9°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4271C4
RGB	rgb(66, 113, 196)
HSL	hsl(218, 52%, 51%)
HSV	hsv(218, 66%, 77%)
CMYK	cmyk(66.3%, 42.3%, 0%, 23.1%)
CIE-LAB	lab(48.20, 11.00, -48.14)
CIE-LCH	lch(48.20, 49.38, 282.88°)
OKLab	oklab(55.69% -0.022 -0.1373)
OKLCH	oklch(55.69% 0.139 260.9)
XYZ	xyz(18.1122, 16.9523, 54.5314)
Luminance	0.1695 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271C4 #C49542

analogous

#42B2C4 #4271C4 #5442C4

triadic

#4271C4 #C44271 #71C442

tetradic

#4271C4 #C442B2 #C49542 #42C454

square

#4271C4 #C442B2 #C49542 #42C454

split-complementary

#4271C4 #C45442 #B2C442

monochromatic

#213C6A #305699 #4271C4 #7194D3 #9FB7E1

Accessibility & contrast

On white

4.78

#4271C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#4271C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271C4

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271C4	#FFFFFF	#000000	##FFFFFF
##4271C4	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A79C7

Deuteranopia (green-blind)

#366DC2

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4271c4;
/* rgb */ color: rgb(66, 113, 196);
/* oklch */ color: oklch(55.7% 0.139 260.9);

Tailwind

colors: {
  custom: {
    50: '#8499d6',
    500: '#4271c4',
    950: '#000000',
  },
}

SCSS

$custom: #4271c4;
$custom-light: #8499d6;
$custom-dark: #000000;

JSON

{
  "hex": "#4271c4",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 196
  },
  "hsl": {
    "h": 218.308,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.55689,
    "c": 0.1391,
    "h": 260.9
  },
  "luminance": 0.16954
}

Semantic roles & 50–950 ramp

primary

#4271C4

secondary

#CEB994

accent

#A84CDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #4271C4

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

Preview Lab → · Contrast checker → · Palette generator →