#1639B4#1639B4

#1639B4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.197 H 265.3°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#1639B4
RGB	rgb(22, 57, 180)
HSL	hsl(227, 78%, 40%)
HSV	hsv(227, 88%, 71%)
CMYK	cmyk(87.8%, 68.3%, 0%, 29.4%)
CIE-LAB	lab(30.38, 36.37, -67.76)
CIE-LCH	lch(30.38, 76.91, 298.22°)
OKLab	oklab(41.4% -0.0161 -0.1965)
OKLCH	oklch(41.4% 0.197 265.3)
XYZ	xyz(10.0293, 6.3908, 43.8761)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1639B4 #B49116

analogous

#1688B4 #1639B4 #4216B4

triadic

#1639B4 #B41639 #39B416

tetradic

#1639B4 #B41688 #B49116 #16B442

square

#1639B4 #B41688 #B49116 #16B442

split-complementary

#1639B4 #B44216 #88B416

monochromatic

#091647 #0F287D #1639B4 #234EE4 #5A7AEB

Accessibility & contrast

On white

9.22

#1639B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1639B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1639B4

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1639B4	#FFFFFF	#000000	##FFFFFF
##1639B4	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB8

Deuteranopia (green-blind)

#0040B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1639b4;
/* rgb */ color: rgb(22, 57, 180);
/* oklch */ color: oklch(41.4% 0.197 265.3);

Tailwind

colors: {
  custom: {
    50: '#756fcc',
    500: '#1639b4',
    950: '#000000',
  },
}

SCSS

$custom: #1639b4;
$custom-light: #756fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1639b4",
  "rgb": {
    "r": 22,
    "g": 57,
    "b": 180
  },
  "hsl": {
    "h": 226.709,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41405,
    "c": 0.19715,
    "h": 265.3
  },
  "luminance": 0.06392
}

Semantic roles & 50–950 ramp

primary

#1639B4

secondary

#CEB458

accent

#CA33F5

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1639B4

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

Preview Lab → · Contrast checker → · Palette generator →