#1B4083#1B4083

#1B4083 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.121 H 261.1°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B4083
RGB	rgb(27, 64, 131)
HSL	hsl(219, 66%, 31%)
HSV	hsv(219, 79%, 51%)
CMYK	cmyk(79.4%, 51.1%, 0%, 48.6%)
CIE-LAB	lab(28.22, 12.63, -41.48)
CIE-LCH	lch(28.22, 43.36, 286.93°)
OKLab	oklab(38.53% -0.0187 -0.1193)
OKLCH	oklch(38.53% 0.121 261.1)
XYZ	xyz(6.3806, 5.5378, 22.2009)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4083 #835E1B

analogous

#1B7483 #1B4083 #2A1B83

triadic

#1B4083 #831B40 #40831B

tetradic

#1B4083 #831B74 #835E1B #1B832A

square

#1B4083 #831B74 #835E1B #1B832A

split-complementary

#1B4083 #832A1B #74831B

monochromatic

#060E1E #112750 #1B4083 #2559B6 #4176D8

Accessibility & contrast

On white

9.96

#1B4083 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B4083 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4083

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4083	#FFFFFF	#000000	##FFFFFF
##1B4083	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184885

Deuteranopia (green-blind)

#003E82

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b4083;
/* rgb */ color: rgb(27, 64, 131);
/* oklch */ color: oklch(38.5% 0.121 261.1);

Tailwind

colors: {
  custom: {
    50: '#6874a7',
    500: '#1b4083',
    950: '#000000',
  },
}

SCSS

$custom: #1b4083;
$custom-light: #6874a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4083",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 131
  },
  "hsl": {
    "h": 218.654,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38534,
    "c": 0.12073,
    "h": 261.1
  },
  "luminance": 0.05538
}

Semantic roles & 50–950 ramp

primary

#1B4083

secondary

#B68D43

accent

#AC3FE9

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4083

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

Preview Lab → · Contrast checker → · Palette generator →