#4271BD#4271BD

#4271BD is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.3% C 0.130 H 259.6°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#4271BD
RGB	rgb(66, 113, 189)
HSL	hsl(217, 48%, 50%)
HSV	hsv(217, 65%, 74%)
CMYK	cmyk(65.1%, 40.2%, 0%, 25.9%)
CIE-LAB	lab(47.80, 8.53, -44.74)
CIE-LCH	lch(47.80, 45.54, 280.79°)
OKLab	oklab(55.26% -0.0234 -0.1274)
OKLCH	oklch(55.26% 0.13 259.6)
XYZ	xyz(17.3339, 16.6410, 50.4328)
Luminance	0.1664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271BD #BD8E42

analogous

#42AFBD #4271BD #5042BD

triadic

#4271BD #BD4271 #71BD42

tetradic

#4271BD #BD42AF #BD8E42 #42BD50

square

#4271BD #BD42AF #BD8E42 #42BD50

split-complementary

#4271BD #BD5042 #AFBD42

monochromatic

#223B62 #325690 #4271BD #6F93CD #9DB5DD

Accessibility & contrast

On white

4.85

#4271BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#4271BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271BD

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271BD	#FFFFFF	#000000	##FFFFFF
##4271BD	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F78C0

Deuteranopia (green-blind)

#3D6CBB

Tritanopia (blue-blind)

#00828E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #4271bd;
/* rgb */ color: rgb(66, 113, 189);
/* oklch */ color: oklch(55.3% 0.130 259.6);

Tailwind

colors: {
  custom: {
    50: '#8299d1',
    500: '#4271bd',
    950: '#000000',
  },
}

SCSS

$custom: #4271bd;
$custom-light: #8299d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4271bd",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 189
  },
  "hsl": {
    "h": 217.073,
    "s": 48.235,
    "l": 50
  },
  "oklch": {
    "l": 0.55255,
    "c": 0.12951,
    "h": 259.6
  },
  "luminance": 0.16643
}

Semantic roles & 50–950 ramp

primary

#4271BD

secondary

#C9B492

accent

#A450D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #4271BD

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

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