#1B3387#1B3387

#1B3387 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.143 H 266.6°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B3387
RGB	rgb(27, 51, 135)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 53%)
CMYK	cmyk(80%, 62.2%, 0%, 47.1%)
CIE-LAB	lab(24.79, 23.33, -49.53)
CIE-LCH	lch(24.79, 54.75, 295.22°)
OKLab	oklab(36.05% -0.0084 -0.1432)
OKLCH	oklch(36.05% 0.143 266.6)
XYZ	xyz(6.0075, 4.3493, 23.4398)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3387 #876F1B

analogous

#1B6987 #1B3387 #391B87

triadic

#1B3387 #871B33 #33871B

tetradic

#1B3387 #871B69 #876F1B #1B8739

square

#1B3387 #871B69 #876F1B #1B8739

split-complementary

#1B3387 #87391B #69871B

monochromatic

#070C21 #112054 #1B3387 #2546BA #4364D9

Accessibility & contrast

On white

11.23

#1B3387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1B3387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3387

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3387	#FFFFFF	#000000	##FFFFFF
##1B3387	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408A

Deuteranopia (green-blind)

#003685

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3387;
/* rgb */ color: rgb(27, 51, 135);
/* oklch */ color: oklch(36.1% 0.143 266.6);

Tailwind

colors: {
  custom: {
    50: '#6a6aab',
    500: '#1b3387',
    950: '#000000',
  },
}

SCSS

$custom: #1b3387;
$custom-light: #6a6aab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3387",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 135
  },
  "hsl": {
    "h": 226.667,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.36052,
    "c": 0.14342,
    "h": 266.6
  },
  "luminance": 0.0435
}

Semantic roles & 50–950 ramp

primary

#1B3387

secondary

#BAA044

accent

#C43EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3387

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

Preview Lab → · Contrast checker → · Palette generator →