#1B3682#1B3682

#1B3682 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.132 H 265.4°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B3682
RGB	rgb(27, 54, 130)
HSL	hsl(224, 66%, 31%)
HSV	hsv(224, 79%, 51%)
CMYK	cmyk(79.2%, 58.5%, 0%, 49%)
CIE-LAB	lab(25.21, 19.23, -45.73)
CIE-LCH	lch(25.21, 49.61, 292.80°)
OKLab	oklab(36.23% -0.0107 -0.132)
OKLCH	oklch(36.23% 0.132 265.4)
XYZ	xyz(5.7990, 4.4824, 21.6743)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3682 #82671B

analogous

#1B6982 #1B3682 #331B82

triadic

#1B3682 #821B36 #36821B

tetradic

#1B3682 #821B69 #82671B #1B8233

square

#1B3682 #821B69 #82671B #1B8233

split-complementary

#1B3682 #82331B #69821B

monochromatic

#060C1D #10214F #1B3682 #264BB5 #4068D7

Accessibility & contrast

On white

11.07

#1B3682 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B3682 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3682

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3682	#FFFFFF	#000000	##FFFFFF
##1B3682	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004185

Deuteranopia (green-blind)

#003781

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b3682;
/* rgb */ color: rgb(27, 54, 130);
/* oklch */ color: oklch(36.2% 0.132 265.4);

Tailwind

colors: {
  custom: {
    50: '#696ca7',
    500: '#1b3682',
    950: '#000000',
  },
}

SCSS

$custom: #1b3682;
$custom-light: #696ca7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3682",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 130
  },
  "hsl": {
    "h": 224.272,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36227,
    "c": 0.1324,
    "h": 265.4
  },
  "luminance": 0.04483
}

Semantic roles & 50–950 ramp

primary

#1B3682

secondary

#B69843

accent

#BC3FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3682

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

Preview Lab → · Contrast checker → · Palette generator →