#4271D1#4271D1

#4271D1 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.5% C 0.157 H 262.8°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#4271D1
RGB	rgb(66, 113, 209)
HSL	hsl(220, 61%, 54%)
HSV	hsv(220, 68%, 82%)
CMYK	cmyk(68.4%, 45.9%, 0%, 18%)
CIE-LAB	lab(48.97, 15.64, -54.34)
CIE-LCH	lch(48.97, 56.55, 286.05°)
OKLab	oklab(56.53% -0.0197 -0.1556)
OKLCH	oklch(56.53% 0.157 262.8)
XYZ	xyz(19.6564, 17.5700, 62.6647)
Luminance	0.1757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D1 #D1A242

analogous

#42B8D1 #4271D1 #5B42D1

triadic

#4271D1 #D14271 #71D142

tetradic

#4271D1 #D142B8 #D1A242 #42D15B

square

#4271D1 #D142B8 #D1A242 #42D15B

split-complementary

#4271D1 #D15B42 #B8D142

monochromatic

#1E3C7B #2A55AC #4271D1 #7396DD #A4BBE9

Accessibility & contrast

On white

4.65

#4271D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#4271D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4271D1

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D1	#FFFFFF	#000000	##FFFFFF
##4271D1	1.00	4.65	4.51	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#407BD5

Deuteranopia (green-blind)

#236ECF

Tritanopia (blue-blind)

#008797

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #4271d1;
/* rgb */ color: rgb(66, 113, 209);
/* oklch */ color: oklch(56.5% 0.157 262.8);

Tailwind

colors: {
  custom: {
    50: '#8699e0',
    500: '#4271d1',
    950: '#000000',
  },
}

SCSS

$custom: #4271d1;
$custom-light: #8699e0;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d1",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 209
  },
  "hsl": {
    "h": 220.28,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.56531,
    "c": 0.15683,
    "h": 262.8
  },
  "luminance": 0.17572
}

Semantic roles & 50–950 ramp

primary

#4271D1

secondary

#D6C299

accent

#AF44E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #4271D1

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

Preview Lab → · Contrast checker → · Palette generator →