#1B4599#1B4599

#1B4599 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.4% C 0.146 H 262.2°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B4599
RGB	rgb(27, 69, 153)
HSL	hsl(220, 70%, 35%)
HSV	hsv(220, 82%, 60%)
CMYK	cmyk(82.4%, 54.9%, 0%, 40%)
CIE-LAB	lab(31.32, 18.11, -49.99)
CIE-LCH	lch(31.32, 53.17, 289.92°)
OKLab	oklab(41.42% -0.0199 -0.1442)
OKLCH	oklch(41.42% 0.146 262.2)
XYZ	xyz(8.3278, 6.7882, 31.0021)
Luminance	0.0679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4599 #996F1B

analogous

#1B8499 #1B4599 #301B99

triadic

#1B4599 #991B45 #45991B

tetradic

#1B4599 #991B84 #996F1B #1B9930

square

#1B4599 #991B84 #996F1B #1B9930

split-complementary

#1B4599 #99301B #84991B

monochromatic

#091631 #122E65 #1B4599 #245CCD #4F7FE0

Accessibility & contrast

On white

8.91

#1B4599 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1B4599 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4599

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4599	#FFFFFF	#000000	##FFFFFF
##1B4599	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509C

Deuteranopia (green-blind)

#004497

Tritanopia (blue-blind)

#005A68

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b4599;
/* rgb */ color: rgb(27, 69, 153);
/* oklch */ color: oklch(41.4% 0.146 262.2);

Tailwind

colors: {
  custom: {
    50: '#6e78b8',
    500: '#1b4599',
    950: '#000000',
  },
}

SCSS

$custom: #1b4599;
$custom-light: #6e78b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4599",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 153
  },
  "hsl": {
    "h": 220,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.41421,
    "c": 0.14557,
    "h": 262.2
  },
  "luminance": 0.06789
}

Semantic roles & 50–950 ramp

primary

#1B4599

secondary

#C29B4E

accent

#B23BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B4599

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

Preview Lab → · Contrast checker → · Palette generator →