#1B4990#1B4990

#1B4990 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 41.6% C 0.128 H 259.1°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#1B4990
RGB	rgb(27, 73, 144)
HSL	hsl(216, 68%, 34%)
HSV	hsv(216, 81%, 56%)
CMYK	cmyk(81.3%, 49.3%, 0%, 43.5%)
CIE-LAB	lab(31.83, 11.73, -43.68)
CIE-LCH	lch(31.83, 45.22, 285.03°)
OKLab	oklab(41.6% -0.0241 -0.1255)
OKLCH	oklch(41.6% 0.128 259.1)
XYZ	xyz(7.8667, 7.0108, 27.3188)
Luminance	0.0701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4990 #90621B

analogous

#1B8390 #1B4990 #271B90

triadic

#1B4990 #901B49 #49901B

tetradic

#1B4990 #901B83 #90621B #1B9027

square

#1B4990 #901B83 #90621B #1B9027

split-complementary

#1B4990 #90271B #83901B

monochromatic

#081529 #112F5C #1B4990 #2563C4 #4983DD

Accessibility & contrast

On white

8.74

#1B4990 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#1B4990 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4990

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4990	#FFFFFF	#000000	##FFFFFF
##1B4990	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#205193

Deuteranopia (green-blind)

#00468F

Tritanopia (blue-blind)

#005A65

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b4990;
/* rgb */ color: rgb(27, 73, 144);
/* oklch */ color: oklch(41.6% 0.128 259.1);

Tailwind

colors: {
  custom: {
    50: '#6b7bb1',
    500: '#1b4990',
    950: '#000000',
  },
}

SCSS

$custom: #1b4990;
$custom-light: #6b7bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4990",
  "rgb": {
    "r": 27,
    "g": 73,
    "b": 144
  },
  "hsl": {
    "h": 216.41,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.41602,
    "c": 0.12785,
    "h": 259.1
  },
  "luminance": 0.07012
}

Semantic roles & 50–950 ramp

primary

#1B4990

secondary

#BF9048

accent

#A73DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080911

muted

#7A7B80

Preview Lab

Preview with #1B4990

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

Preview Lab → · Contrast checker → · Palette generator →