#4271C7#4271C7

#4271C7 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.9% C 0.143 H 261.4°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#4271C7
RGB	rgb(66, 113, 199)
HSL	hsl(219, 54%, 52%)
HSV	hsv(219, 67%, 78%)
CMYK	cmyk(66.8%, 43.2%, 0%, 22%)
CIE-LAB	lab(48.37, 12.07, -49.58)
CIE-LCH	lch(48.37, 51.03, 283.68°)
OKLab	oklab(55.88% -0.0214 -0.1416)
OKLCH	oklch(55.88% 0.143 261.4)
XYZ	xyz(18.4570, 17.0902, 56.3478)
Luminance	0.1709 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271C7 #C79842

analogous

#42B4C7 #4271C7 #5642C7

triadic

#4271C7 #C74271 #71C742

tetradic

#4271C7 #C742B4 #C79842 #42C756

square

#4271C7 #C742B4 #C79842 #42C756

split-complementary

#4271C7 #C75642 #B4C742

monochromatic

#213C6E #2F569D #4271C7 #7194D5 #A0B8E3

Accessibility & contrast

On white

4.75

#4271C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#4271C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271C7

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271C7	#FFFFFF	#000000	##FFFFFF
##4271C7	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4879CA

Deuteranopia (green-blind)

#326DC5

Tritanopia (blue-blind)

#008592

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4271c7;
/* rgb */ color: rgb(66, 113, 199);
/* oklch */ color: oklch(55.9% 0.143 261.4);

Tailwind

colors: {
  custom: {
    50: '#8499d8',
    500: '#4271c7',
    950: '#000000',
  },
}

SCSS

$custom: #4271c7;
$custom-light: #8499d8;
$custom-dark: #000000;

JSON

{
  "hex": "#4271c7",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 199
  },
  "hsl": {
    "h": 218.797,
    "s": 54.286,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55879,
    "c": 0.1432,
    "h": 261.4
  },
  "luminance": 0.17092
}

Semantic roles & 50–950 ramp

primary

#4271C7

secondary

#D0BB95

accent

#AA4ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #4271C7

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

Preview Lab → · Contrast checker → · Palette generator →