#4739B8#4739B8

#4739B8 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.4% C 0.191 H 280.3°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#4739B8
RGB	rgb(71, 57, 184)
HSL	hsl(247, 53%, 47%)
HSV	hsv(247, 69%, 72%)
CMYK	cmyk(61.4%, 69%, 0%, 27.8%)
CIE-LAB	lab(33.40, 42.74, -65.06)
CIE-LCH	lch(33.40, 77.84, 303.30°)
OKLab	oklab(44.42% 0.0339 -0.1875)
OKLCH	oklch(44.42% 0.191 280.3)
XYZ	xyz(12.7107, 7.7256, 46.1595)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.55

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4739B8 #AAB839

analogous

#396BB8 #4739B8 #8639B8

triadic

#4739B8 #B84739 #39B847

tetradic

#4739B8 #B8396B #AAB839 #39B886

square

#4739B8 #B8396B #AAB839 #39B886

split-complementary

#4739B8 #B88639 #6BB839

monochromatic

#231C5B #352B89 #4739B8 #6C60CE #988FDC

Accessibility & contrast

On white

8.25

#4739B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#4739B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4739B8

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4739B8	#FFFFFF	#000000	##FFFFFF
##4739B8	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4739b8;
/* rgb */ color: rgb(71, 57, 184);
/* oklch */ color: oklch(44.4% 0.191 280.3);

Tailwind

colors: {
  custom: {
    50: '#8771ce',
    500: '#4739b8',
    950: '#000000',
  },
}

SCSS

$custom: #4739b8;
$custom-light: #8771ce;
$custom-dark: #000000;

JSON

{
  "hex": "#4739b8",
  "rgb": {
    "r": 71,
    "g": 57,
    "b": 184
  },
  "hsl": {
    "h": 246.614,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44415,
    "c": 0.19057,
    "h": 280.3
  },
  "luminance": 0.07727
}

Semantic roles & 50–950 ramp

primary

#4739B8

secondary

#C0C786

accent

#DC4CCC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0D0814

muted

#7D7B82

Preview Lab

Preview with #4739B8

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

Preview Lab → · Contrast checker → · Palette generator →