#4271BA#4271BA

#4271BA is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.1% C 0.125 H 258.9°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#4271BA
RGB	rgb(66, 113, 186)
HSL	hsl(217, 48%, 49%)
HSV	hsv(217, 65%, 73%)
CMYK	cmyk(64.5%, 39.2%, 0%, 27.1%)
CIE-LAB	lab(47.64, 7.47, -43.27)
CIE-LCH	lch(47.64, 43.91, 279.80°)
OKLab	oklab(55.07% -0.0241 -0.1231)
OKLCH	oklch(55.07% 0.125 258.9)
XYZ	xyz(17.0117, 16.5121, 48.7355)
Luminance	0.1651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271BA #BA8B42

analogous

#42ADBA #4271BA #4F42BA

triadic

#4271BA #BA4271 #71BA42

tetradic

#4271BA #BA42AD #BA8B42 #42BA4F

square

#4271BA #BA42AD #BA8B42 #42BA4F

split-complementary

#4271BA #BA4F42 #ADBA42

monochromatic

#223A60 #32568D #4271BA #6E92CB #9BB4DB

Accessibility & contrast

On white

4.88

#4271BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#4271BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271BA

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271BA	#FFFFFF	#000000	##FFFFFF
##4271BA	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5177BD

Deuteranopia (green-blind)

#3F6CB8

Tritanopia (blue-blind)

#00828C

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #4271ba;
/* rgb */ color: rgb(66, 113, 186);
/* oklch */ color: oklch(55.1% 0.125 258.9);

Tailwind

colors: {
  custom: {
    50: '#8299cf',
    500: '#4271ba',
    950: '#000000',
  },
}

SCSS

$custom: #4271ba;
$custom-light: #8299cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4271ba",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 186
  },
  "hsl": {
    "h": 216.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55073,
    "c": 0.1254,
    "h": 258.9
  },
  "luminance": 0.16514
}

Semantic roles & 50–950 ramp

primary

#4271BA

secondary

#C8B290

accent

#A251D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #4271BA

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

Preview Lab → · Contrast checker → · Palette generator →