#1B4CA8#1B4CA8

#1B4CA8 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.2% C 0.157 H 261.5°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B4CA8
RGB	rgb(27, 76, 168)
HSL	hsl(219, 72%, 38%)
HSV	hsv(219, 84%, 66%)
CMYK	cmyk(83.9%, 54.8%, 0%, 34.1%)
CIE-LAB	lab(34.45, 19.37, -53.94)
CIE-LCH	lch(34.45, 57.31, 289.76°)
OKLab	oklab(44.16% -0.0232 -0.1557)
OKLCH	oklch(44.16% 0.157 261.5)
XYZ	xyz(10.1018, 8.2278, 38.0939)
Luminance	0.0823 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4CA8 #A8771B

analogous

#1B92A8 #1B4CA8 #301BA8

triadic

#1B4CA8 #A81B4C #4CA81B

tetradic

#1B4CA8 #A81B92 #A8771B #1BA830

square

#1B4CA8 #A81B92 #A8771B #1BA830

split-complementary

#1B4CA8 #A8301B #92A81B

monochromatic

#0A1C3F #133473 #1B4CA8 #2464DC #5989E4

Accessibility & contrast

On white

7.94

#1B4CA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1B4CA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4CA8

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4CA8	#FFFFFF	#000000	##FFFFFF
##1B4CA8	1.00	7.94	2.65	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058AB

Deuteranopia (green-blind)

#004BA6

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4ca8;
/* rgb */ color: rgb(27, 76, 168);
/* oklch */ color: oklch(44.2% 0.157 261.5);

Tailwind

colors: {
  custom: {
    50: '#717dc3',
    500: '#1b4ca8',
    950: '#000000',
  },
}

SCSS

$custom: #1b4ca8;
$custom-light: #717dc3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4ca8",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 168
  },
  "hsl": {
    "h": 219.149,
    "s": 72.308,
    "l": 38.235
  },
  "oklch": {
    "l": 0.4416,
    "c": 0.1574,
    "h": 261.5
  },
  "luminance": 0.08229
}

Semantic roles & 50–950 ramp

primary

#1B4CA8

secondary

#C8A157

accent

#B039EF

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4CA8

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

Preview Lab → · Contrast checker → · Palette generator →