#4271CB#4271CB

#4271CB is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.1% C 0.149 H 262.0°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#4271CB
RGB	rgb(66, 113, 203)
HSL	hsl(219, 57%, 53%)
HSV	hsv(219, 67%, 80%)
CMYK	cmyk(67.5%, 44.3%, 0%, 20.4%)
CIE-LAB	lab(48.61, 13.49, -51.50)
CIE-LCH	lch(48.61, 53.24, 284.68°)
OKLab	oklab(56.14% -0.0207 -0.1472)
OKLCH	oklch(56.14% 0.149 262)
XYZ	xyz(18.9276, 17.2784, 58.8259)
Luminance	0.1728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271CB #CB9C42

analogous

#42B5CB #4271CB #5742CB

triadic

#4271CB #CB4271 #71CB42

tetradic

#4271CB #CB42B5 #CB9C42 #42CB57

square

#4271CB #CB42B5 #CB9C42 #42CB57

split-complementary

#4271CB #CB5742 #B5CB42

monochromatic

#203C73 #2D55A3 #4271CB #7295D8 #A2B9E5

Accessibility & contrast

On white

4.71

#4271CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#4271CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271CB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271CB	#FFFFFF	#000000	##FFFFFF
##4271CB	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#457ACE

Deuteranopia (green-blind)

#2D6EC9

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4271cb;
/* rgb */ color: rgb(66, 113, 203);
/* oklch */ color: oklch(56.1% 0.149 262.0);

Tailwind

colors: {
  custom: {
    50: '#8599db',
    500: '#4271cb',
    950: '#000000',
  },
}

SCSS

$custom: #4271cb;
$custom-light: #8599db;
$custom-dark: #000000;

JSON

{
  "hex": "#4271cb",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 203
  },
  "hsl": {
    "h": 219.416,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.56137,
    "c": 0.14867,
    "h": 262
  },
  "luminance": 0.1728
}

Semantic roles & 50–950 ramp

primary

#4271CB

secondary

#D2BE97

accent

#AC48E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #4271CB

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

Preview Lab → · Contrast checker → · Palette generator →