#1644B4#1644B4

#1644B4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.4% C 0.184 H 263.5°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#1644B4
RGB	rgb(22, 68, 180)
HSL	hsl(223, 78%, 40%)
HSV	hsv(223, 88%, 71%)
CMYK	cmyk(87.8%, 62.2%, 0%, 29.4%)
CIE-LAB	lab(33.13, 29.14, -63.24)
CIE-LCH	lch(33.13, 69.63, 294.74°)
OKLab	oklab(43.44% -0.0207 -0.1832)
OKLCH	oklch(43.44% 0.184 263.5)
XYZ	xyz(10.6333, 7.5987, 44.0774)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1644B4 #B48616

analogous

#1693B4 #1644B4 #3716B4

triadic

#1644B4 #B41644 #44B416

tetradic

#1644B4 #B41693 #B48616 #16B437

square

#1644B4 #B41693 #B48616 #16B437

split-complementary

#1644B4 #B43716 #93B416

monochromatic

#091B47 #0F2F7D #1644B4 #235BE4 #5A84EB

Accessibility & contrast

On white

8.33

#1644B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1644B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1644B4

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1644B4	#FFFFFF	#000000	##FFFFFF
##1644B4	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#0047B2

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1644b4;
/* rgb */ color: rgb(22, 68, 180);
/* oklch */ color: oklch(43.4% 0.184 263.5);

Tailwind

colors: {
  custom: {
    50: '#7477cb',
    500: '#1644b4',
    950: '#000000',
  },
}

SCSS

$custom: #1644b4;
$custom-light: #7477cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1644b4",
  "rgb": {
    "r": 22,
    "g": 68,
    "b": 180
  },
  "hsl": {
    "h": 222.532,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.43436,
    "c": 0.18434,
    "h": 263.5
  },
  "luminance": 0.076
}

Semantic roles & 50–950 ramp

primary

#1644B4

secondary

#CEAC58

accent

#BC33F5

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1644B4

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

Preview Lab → · Contrast checker → · Palette generator →