#1B4590#1B4590

#1B4590 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 40.7% C 0.133 H 260.9°. Best body text is #FFFFFF at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B4590
RGB	rgb(27, 69, 144)
HSL	hsl(218, 68%, 34%)
HSV	hsv(218, 81%, 56%)
CMYK	cmyk(81.3%, 52.1%, 0%, 43.5%)
CIE-LAB	lab(30.65, 14.47, -45.59)
CIE-LCH	lch(30.65, 47.83, 287.61°)
OKLab	oklab(40.69% -0.0209 -0.1313)
OKLCH	oklch(40.69% 0.133 260.9)
XYZ	xyz(7.6123, 6.5020, 27.2340)
Luminance	0.0650 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4590 #90661B

analogous

#1B7F90 #1B4590 #2C1B90

triadic

#1B4590 #901B45 #45901B

tetradic

#1B4590 #901B7F #90661B #1B902C

square

#1B4590 #901B7F #90661B #1B902C

split-complementary

#1B4590 #902C1B #7F901B

monochromatic

#081429 #112C5C #1B4590 #255EC4 #497EDD

Accessibility & contrast

On white

9.13

#1B4590 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1B4590 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4590

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4590	#FFFFFF	#000000	##FFFFFF
##1B4590	1.00	9.13	2.30	9.13
#FFFFFF	9.13	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144E93

Deuteranopia (green-blind)

#00438F

Tritanopia (blue-blind)

#005763

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4590;
/* rgb */ color: rgb(27, 69, 144);
/* oklch */ color: oklch(40.7% 0.133 260.9);

Tailwind

colors: {
  custom: {
    50: '#6b78b1',
    500: '#1b4590',
    950: '#000000',
  },
}

SCSS

$custom: #1b4590;
$custom-light: #6b78b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4590",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 144
  },
  "hsl": {
    "h": 218.462,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.40693,
    "c": 0.13292,
    "h": 260.9
  },
  "luminance": 0.06503
}

Semantic roles & 50–950 ramp

primary

#1B4590

secondary

#BF9448

accent

#AD3DEB

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B4590

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

Preview Lab → · Contrast checker → · Palette generator →