#1B3282#1B3282

#1B3282 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.4% C 0.138 H 266.8°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B3282
RGB	rgb(27, 50, 130)
HSL	hsl(227, 66%, 31%)
HSV	hsv(227, 79%, 51%)
CMYK	cmyk(79.2%, 61.5%, 0%, 49%)
CIE-LAB	lab(24.08, 22.03, -47.56)
CIE-LCH	lch(24.08, 52.42, 294.85°)
OKLab	oklab(35.39% -0.0078 -0.1374)
OKLCH	oklch(35.39% 0.138 266.8)
XYZ	xyz(5.6205, 4.1253, 21.6148)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3282 #826B1B

analogous

#1B6582 #1B3282 #371B82

triadic

#1B3282 #821B32 #32821B

tetradic

#1B3282 #821B65 #826B1B #1B8237

square

#1B3282 #821B65 #826B1B #1B8237

split-complementary

#1B3282 #82371B #65821B

monochromatic

#060B1D #101F4F #1B3282 #2645B5 #4062D7

Accessibility & contrast

On white

11.51

#1B3282 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1B3282 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3282

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3282	#FFFFFF	#000000	##FFFFFF
##1B3282	1.00	11.51	1.83	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E85

Deuteranopia (green-blind)

#003580

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3282;
/* rgb */ color: rgb(27, 50, 130);
/* oklch */ color: oklch(35.4% 0.138 266.8);

Tailwind

colors: {
  custom: {
    50: '#6969a7',
    500: '#1b3282',
    950: '#000000',
  },
}

SCSS

$custom: #1b3282;
$custom-light: #6969a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3282",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 130
  },
  "hsl": {
    "h": 226.602,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35385,
    "c": 0.13764,
    "h": 266.8
  },
  "luminance": 0.04126
}

Semantic roles & 50–950 ramp

primary

#1B3282

secondary

#B69C43

accent

#C33FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B3282

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

Preview Lab → · Contrast checker → · Palette generator →