#4271C5#4271C5

#4271C5 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.140 H 261.1°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#4271C5
RGB	rgb(66, 113, 197)
HSL	hsl(218, 53%, 52%)
HSV	hsv(218, 66%, 77%)
CMYK	cmyk(66.5%, 42.6%, 0%, 22.7%)
CIE-LAB	lab(48.26, 11.36, -48.62)
CIE-LCH	lch(48.26, 49.93, 283.15°)
OKLab	oklab(55.75% -0.0218 -0.1388)
OKLCH	oklch(55.75% 0.14 261.1)
XYZ	xyz(18.2264, 16.9979, 55.1329)
Luminance	0.1700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271C5 #C59642

analogous

#42B3C5 #4271C5 #5542C5

triadic

#4271C5 #C54271 #71C542

tetradic

#4271C5 #C542B3 #C59642 #42C555

square

#4271C5 #C542B3 #C59642 #42C555

split-complementary

#4271C5 #C55542 #B3C542

monochromatic

#213C6C #2F569A #4271C5 #7194D3 #A0B7E2

Accessibility & contrast

On white

4.77

#4271C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#4271C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271C5

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271C5	#FFFFFF	#000000	##FFFFFF
##4271C5	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A79C8

Deuteranopia (green-blind)

#346DC3

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4271c5;
/* rgb */ color: rgb(66, 113, 197);
/* oklch */ color: oklch(55.8% 0.140 261.1);

Tailwind

colors: {
  custom: {
    50: '#8499d7',
    500: '#4271c5',
    950: '#000000',
  },
}

SCSS

$custom: #4271c5;
$custom-light: #8499d7;
$custom-dark: #000000;

JSON

{
  "hex": "#4271c5",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 197
  },
  "hsl": {
    "h": 218.473,
    "s": 53.036,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55752,
    "c": 0.14047,
    "h": 261.1
  },
  "luminance": 0.17
}

Semantic roles & 50–950 ramp

primary

#4271C5

secondary

#CEBA95

accent

#A84BDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #4271C5

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

Preview Lab → · Contrast checker → · Palette generator →