#1B4A99#1B4A99

#1B4A99 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 42.5% C 0.139 H 260.3°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A99
RGB	rgb(27, 74, 153)
HSL	hsl(218, 70%, 35%)
HSV	hsv(218, 82%, 60%)
CMYK	cmyk(82.4%, 51.6%, 0%, 40%)
CIE-LAB	lab(32.77, 14.70, -47.65)
CIE-LCH	lch(32.77, 49.86, 287.14°)
OKLab	oklab(42.52% -0.0236 -0.1372)
OKLCH	oklch(42.52% 0.139 260.3)
XYZ	xyz(8.6485, 7.4294, 31.1090)
Luminance	0.0743 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A99 #996A1B

analogous

#1B8999 #1B4A99 #2B1B99

triadic

#1B4A99 #991B4A #4A991B

tetradic

#1B4A99 #991B89 #996A1B #1B992B

square

#1B4A99 #991B89 #996A1B #1B992B

split-complementary

#1B4A99 #992B1B #89991B

monochromatic

#091831 #123165 #1B4A99 #2463CD #4F85E0

Accessibility & contrast

On white

8.45

#1B4A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#1B4A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A99

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A99	#FFFFFF	#000000	##FFFFFF
##1B4A99	1.00	8.45	2.49	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17539C

Deuteranopia (green-blind)

#004897

Tritanopia (blue-blind)

#005D6A

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4a99;
/* rgb */ color: rgb(27, 74, 153);
/* oklch */ color: oklch(42.5% 0.139 260.3);

Tailwind

colors: {
  custom: {
    50: '#6d7bb8',
    500: '#1b4a99',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a99;
$custom-light: #6d7bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a99",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 153
  },
  "hsl": {
    "h": 217.619,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.42522,
    "c": 0.13923,
    "h": 260.3
  },
  "luminance": 0.0743
}

Semantic roles & 50–950 ramp

primary

#1B4A99

secondary

#C2974E

accent

#AA3BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4A99

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

Preview Lab → · Contrast checker → · Palette generator →