#4271D3#4271D3

#4271D3 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.7% C 0.160 H 263.0°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#4271D3
RGB	rgb(66, 113, 211)
HSL	hsl(221, 62%, 54%)
HSV	hsv(221, 69%, 83%)
CMYK	cmyk(68.7%, 46.4%, 0%, 17.3%)
CIE-LAB	lab(49.09, 16.35, -55.28)
CIE-LCH	lch(49.09, 57.65, 286.48°)
OKLab	oklab(56.67% -0.0194 -0.1584)
OKLCH	oklch(56.67% 0.16 263)
XYZ	xyz(19.9056, 17.6696, 63.9769)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D3 #D3A442

analogous

#42B9D3 #4271D3 #5C42D3

triadic

#4271D3 #D34271 #71D342

tetradic

#4271D3 #D342B9 #D3A442 #42D35C

square

#4271D3 #D342B9 #D3A442 #42D35C

split-complementary

#4271D3 #D35C42 #B9D342

monochromatic

#1D3C7D #2954AF #4271D3 #7496DF #A5BCEA

Accessibility & contrast

On white

4.63

#4271D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#4271D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4271D3

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D3	#FFFFFF	#000000	##FFFFFF
##4271D3	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7CD7

Deuteranopia (green-blind)

#1F6ED1

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4271d3;
/* rgb */ color: rgb(66, 113, 211);
/* oklch */ color: oklch(56.7% 0.160 263.0);

Tailwind

colors: {
  custom: {
    50: '#8699e1',
    500: '#4271d3',
    950: '#000000',
  },
}

SCSS

$custom: #4271d3;
$custom-light: #8699e1;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d3",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 211
  },
  "hsl": {
    "h": 220.552,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.56665,
    "c": 0.15954,
    "h": 263
  },
  "luminance": 0.17672
}

Semantic roles & 50–950 ramp

primary

#4271D3

secondary

#D7C39A

accent

#B142E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #4271D3

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

Preview Lab → · Contrast checker → · Palette generator →