#1B4D99#1B4D99

#1B4D99 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.2% C 0.135 H 259.0°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D99
RGB	rgb(27, 77, 153)
HSL	hsl(216, 70%, 35%)
HSV	hsv(216, 82%, 60%)
CMYK	cmyk(82.4%, 49.7%, 0%, 40%)
CIE-LAB	lab(33.65, 12.66, -46.23)
CIE-LCH	lch(33.65, 47.93, 285.32°)
OKLab	oklab(43.2% -0.0259 -0.133)
OKLCH	oklch(43.2% 0.135 259)
XYZ	xyz(8.8535, 7.8396, 31.1774)
Luminance	0.0784 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D99 #99671B

analogous

#1B8C99 #1B4D99 #281B99

triadic

#1B4D99 #991B4D #4D991B

tetradic

#1B4D99 #991B8C #99671B #1B9928

square

#1B4D99 #991B8C #99671B #1B9928

split-complementary

#1B4D99 #99281B #8C991B

monochromatic

#091931 #123365 #1B4D99 #2467CD #4F88E0

Accessibility & contrast

On white

8.18

#1B4D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1B4D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D99

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D99	#FFFFFF	#000000	##FFFFFF
##1B4D99	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20559C

Deuteranopia (green-blind)

#004A97

Tritanopia (blue-blind)

#005F6B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b4d99;
/* rgb */ color: rgb(27, 77, 153);
/* oklch */ color: oklch(43.2% 0.135 259.0);

Tailwind

colors: {
  custom: {
    50: '#6d7eb8',
    500: '#1b4d99',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d99;
$custom-light: #6d7eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d99",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 153
  },
  "hsl": {
    "h": 216.19,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.43197,
    "c": 0.13546,
    "h": 259
  },
  "luminance": 0.07841
}

Semantic roles & 50–950 ramp

primary

#1B4D99

secondary

#C2944E

accent

#A63BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4D99

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

Preview Lab → · Contrast checker → · Palette generator →