#4271D5#4271D5

#4271D5 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.8% C 0.162 H 263.2°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#4271D5
RGB	rgb(66, 113, 213)
HSL	hsl(221, 64%, 55%)
HSV	hsv(221, 69%, 84%)
CMYK	cmyk(69%, 46.9%, 0%, 16.5%)
CIE-LAB	lab(49.22, 17.07, -56.22)
CIE-LCH	lch(49.22, 58.76, 286.89°)
OKLab	oklab(56.8% -0.0191 -0.1611)
OKLCH	oklch(56.8% 0.162 263.2)
XYZ	xyz(20.1579, 17.7705, 65.3056)
Luminance	0.1777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271D5 #D5A642

analogous

#42BBD5 #4271D5 #5C42D5

triadic

#4271D5 #D54271 #71D542

tetradic

#4271D5 #D542BB #D5A642 #42D55C

square

#4271D5 #D542BB #D5A642 #42D55C

split-complementary

#4271D5 #D55C42 #BBD542

monochromatic

#1C3C80 #2854B2 #4271D5 #7497E0 #A6BCEB

Accessibility & contrast

On white

4.61

#4271D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#4271D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4271D5

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271D5	#FFFFFF	#000000	##FFFFFF
##4271D5	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C7CD9

Deuteranopia (green-blind)

#1A6FD3

Tritanopia (blue-blind)

#008899

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4271d5;
/* rgb */ color: rgb(66, 113, 213);
/* oklch */ color: oklch(56.8% 0.162 263.2);

Tailwind

colors: {
  custom: {
    50: '#8799e2',
    500: '#4271d5',
    950: '#000000',
  },
}

SCSS

$custom: #4271d5;
$custom-light: #8799e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4271d5",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 213
  },
  "hsl": {
    "h": 220.816,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.56799,
    "c": 0.16224,
    "h": 263.2
  },
  "luminance": 0.17773
}

Semantic roles & 50–950 ramp

primary

#4271D5

secondary

#D8C59A

accent

#B241E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0D15

muted

#7D7E83

Preview Lab

Preview with #4271D5

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

Preview Lab → · Contrast checker → · Palette generator →