#1B3D82#1B3D82

#1B3D82 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.8% C 0.123 H 262.4°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D82
RGB	rgb(27, 61, 130)
HSL	hsl(220, 66%, 31%)
HSV	hsv(220, 79%, 51%)
CMYK	cmyk(79.2%, 53.1%, 0%, 49%)
CIE-LAB	lab(27.25, 14.31, -42.42)
CIE-LCH	lch(27.25, 44.77, 288.64°)
OKLab	oklab(37.77% -0.0163 -0.1221)
OKLCH	oklch(37.77% 0.123 262.4)
XYZ	xyz(6.1486, 5.1815, 21.7908)
Luminance	0.0518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D82 #82601B

analogous

#1B7082 #1B3D82 #2C1B82

triadic

#1B3D82 #821B3D #3D821B

tetradic

#1B3D82 #821B70 #82601B #1B822C

square

#1B3D82 #821B70 #82601B #1B822C

split-complementary

#1B3D82 #822C1B #70821B

monochromatic

#060D1D #10254F #1B3D82 #2655B5 #4072D7

Accessibility & contrast

On white

10.31

#1B3D82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1B3D82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D82

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D82	#FFFFFF	#000000	##FFFFFF
##1B3D82	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104584

Deuteranopia (green-blind)

#003C81

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3d82;
/* rgb */ color: rgb(27, 61, 130);
/* oklch */ color: oklch(37.8% 0.123 262.4);

Tailwind

colors: {
  custom: {
    50: '#6871a7',
    500: '#1b3d82',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d82;
$custom-light: #6871a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d82",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 130
  },
  "hsl": {
    "h": 220.194,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37771,
    "c": 0.12319,
    "h": 262.4
  },
  "luminance": 0.05182
}

Semantic roles & 50–950 ramp

primary

#1B3D82

secondary

#B69043

accent

#B13FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D82

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

Preview Lab → · Contrast checker → · Palette generator →