#1643B4#1643B4

#1643B4 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.2% C 0.186 H 263.7°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1643B4
RGB	rgb(22, 67, 180)
HSL	hsl(223, 78%, 40%)
HSV	hsv(223, 88%, 71%)
CMYK	cmyk(87.8%, 62.8%, 0%, 29.4%)
CIE-LAB	lab(32.87, 29.81, -63.66)
CIE-LCH	lch(32.87, 70.30, 295.09°)
OKLab	oklab(43.24% -0.0202 -0.1844)
OKLCH	oklch(43.24% 0.186 263.7)
XYZ	xyz(10.5733, 7.4788, 44.0574)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1643B4 #B48716

analogous

#1692B4 #1643B4 #3816B4

triadic

#1643B4 #B41643 #43B416

tetradic

#1643B4 #B41692 #B48716 #16B438

square

#1643B4 #B41692 #B48716 #16B438

split-complementary

#1643B4 #B43816 #92B416

monochromatic

#091A47 #0F2F7D #1643B4 #235AE4 #5A83EB

Accessibility & contrast

On white

8.41

#1643B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1643B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1643B4

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1643B4	#FFFFFF	#000000	##FFFFFF
##1643B4	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#0046B2

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1643b4;
/* rgb */ color: rgb(22, 67, 180);
/* oklch */ color: oklch(43.2% 0.186 263.7);

Tailwind

colors: {
  custom: {
    50: '#7476cb',
    500: '#1643b4',
    950: '#000000',
  },
}

SCSS

$custom: #1643b4;
$custom-light: #7476cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1643b4",
  "rgb": {
    "r": 22,
    "g": 67,
    "b": 180
  },
  "hsl": {
    "h": 222.911,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.43243,
    "c": 0.18554,
    "h": 263.7
  },
  "luminance": 0.0748
}

Semantic roles & 50–950 ramp

primary

#1643B4

secondary

#CEAC58

accent

#BE33F5

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1643B4

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

Preview Lab → · Contrast checker → · Palette generator →