#1B4090#1B4090

#1B4090 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.6% C 0.139 H 263.0°. Best body text is #FFFFFF at 9.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B4090
RGB	rgb(27, 64, 144)
HSL	hsl(221, 68%, 34%)
HSV	hsv(221, 81%, 56%)
CMYK	cmyk(81.3%, 55.6%, 0%, 43.5%)
CIE-LAB	lab(29.19, 17.92, -47.95)
CIE-LCH	lch(29.19, 51.18, 290.49°)
OKLab	oklab(39.59% -0.0171 -0.1383)
OKLCH	oklch(39.59% 0.139 263)
XYZ	xyz(7.3176, 5.9126, 27.1357)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4090 #906B1B

analogous

#1B7A90 #1B4090 #311B90

triadic

#1B4090 #901B40 #40901B

tetradic

#1B4090 #901B7A #906B1B #1B9031

square

#1B4090 #901B7A #906B1B #1B9031

split-complementary

#1B4090 #90311B #7A901B

monochromatic

#081229 #11295C #1B4090 #2557C4 #4977DD

Accessibility & contrast

On white

9.62

#1B4090 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1B4090 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4090

9.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4090	#FFFFFF	#000000	##FFFFFF
##1B4090	1.00	9.62	2.18	9.62
#FFFFFF	9.62	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A93

Deuteranopia (green-blind)

#00408E

Tritanopia (blue-blind)

#005461

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4090;
/* rgb */ color: rgb(27, 64, 144);
/* oklch */ color: oklch(39.6% 0.139 263.0);

Tailwind

colors: {
  custom: {
    50: '#6c74b1',
    500: '#1b4090',
    950: '#000000',
  },
}

SCSS

$custom: #1b4090;
$custom-light: #6c74b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4090",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 144
  },
  "hsl": {
    "h": 221.026,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.39587,
    "c": 0.13934,
    "h": 263
  },
  "luminance": 0.05913
}

Semantic roles & 50–950 ramp

primary

#1B4090

secondary

#BF9948

accent

#B43DEB

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B4090

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

Preview Lab → · Contrast checker → · Palette generator →