#4271BC#4271BC

#4271BC is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.2% C 0.128 H 259.4°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#4271BC
RGB	rgb(66, 113, 188)
HSL	hsl(217, 48%, 50%)
HSV	hsv(217, 65%, 74%)
CMYK	cmyk(64.9%, 39.9%, 0%, 26.3%)
CIE-LAB	lab(47.75, 8.17, -44.25)
CIE-LCH	lch(47.75, 45.00, 280.47°)
OKLab	oklab(55.19% -0.0237 -0.1259)
OKLCH	oklch(55.19% 0.128 259.4)
XYZ	xyz(17.2258, 16.5977, 49.8631)
Luminance	0.1660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271BC #BC8D42

analogous

#42AEBC #4271BC #5042BC

triadic

#4271BC #BC4271 #71BC42

tetradic

#4271BC #BC42AE #BC8D42 #42BC50

square

#4271BC #BC42AE #BC8D42 #42BC50

split-complementary

#4271BC #BC5042 #AEBC42

monochromatic

#223B61 #32568F #4271BC #6F93CC #9CB5DC

Accessibility & contrast

On white

4.86

#4271BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#4271BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271BC

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271BC	#FFFFFF	#000000	##FFFFFF
##4271BC	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F77BF

Deuteranopia (green-blind)

#3E6CBA

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #4271bc;
/* rgb */ color: rgb(66, 113, 188);
/* oklch */ color: oklch(55.2% 0.128 259.4);

Tailwind

colors: {
  custom: {
    50: '#8299d0',
    500: '#4271bc',
    950: '#000000',
  },
}

SCSS

$custom: #4271bc;
$custom-light: #8299d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4271bc",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 188
  },
  "hsl": {
    "h": 216.885,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55194,
    "c": 0.12814,
    "h": 259.4
  },
  "luminance": 0.16599
}

Semantic roles & 50–950 ramp

primary

#4271BC

secondary

#C9B391

accent

#A350D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #4271BC

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

Preview Lab → · Contrast checker → · Palette generator →