#1B3C82#1B3C82

#1B3C82 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.124 H 262.9°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C82
RGB	rgb(27, 60, 130)
HSL	hsl(221, 66%, 31%)
HSV	hsv(221, 79%, 51%)
CMYK	cmyk(79.2%, 53.8%, 0%, 49%)
CIE-LAB	lab(26.95, 15.01, -42.90)
CIE-LCH	lch(26.95, 45.45, 289.29°)
OKLab	oklab(37.55% -0.0154 -0.1235)
OKLCH	oklch(37.55% 0.125 262.9)
XYZ	xyz(6.0957, 5.0757, 21.7732)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C82 #82611B

analogous

#1B6F82 #1B3C82 #2E1B82

triadic

#1B3C82 #821B3C #3C821B

tetradic

#1B3C82 #821B6F #82611B #1B822E

square

#1B3C82 #821B6F #82611B #1B822E

split-complementary

#1B3C82 #822E1B #6F821B

monochromatic

#060D1D #10254F #1B3C82 #2653B5 #4071D7

Accessibility & contrast

On white

10.42

#1B3C82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B3C82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C82

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C82	#FFFFFF	#000000	##FFFFFF
##1B3C82	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B4584

Deuteranopia (green-blind)

#003B81

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3c82;
/* rgb */ color: rgb(27, 60, 130);
/* oklch */ color: oklch(37.5% 0.124 262.9);

Tailwind

colors: {
  custom: {
    50: '#6871a7',
    500: '#1b3c82',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c82;
$custom-light: #6871a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c82",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 130
  },
  "hsl": {
    "h": 220.777,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37545,
    "c": 0.1245,
    "h": 262.9
  },
  "luminance": 0.05076
}

Semantic roles & 50–950 ramp

primary

#1B3C82

secondary

#B69143

accent

#B23FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3C82

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

Preview Lab → · Contrast checker → · Palette generator →