#1B2387#1B2387

#1B2387 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.1% C 0.163 H 270.2°. Best body text is #FFFFFF at 12.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B2387
RGB	rgb(27, 35, 135)
HSL	hsl(236, 67%, 32%)
HSV	hsv(236, 80%, 53%)
CMYK	cmyk(80%, 74.1%, 0%, 47.1%)
CIE-LAB	lab(20.77, 34.04, -56.15)
CIE-LCH	lch(20.77, 65.66, 301.23°)
OKLab	oklab(33.11% 0.0007 -0.1626)
OKLCH	oklch(33.11% 0.163 270.2)
XYZ	xyz(5.4247, 3.1837, 23.2456)
Luminance	0.0318 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2387 #877F1B

analogous

#1B5987 #1B2387 #491B87

triadic

#1B2387 #871B23 #23871B

tetradic

#1B2387 #871B59 #877F1B #1B8749

square

#1B2387 #871B59 #877F1B #1B8749

split-complementary

#1B2387 #87491B #59871B

monochromatic

#070921 #111654 #1B2387 #2530BA #434ED9

Accessibility & contrast

On white

12.83

#1B2387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B2387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2387

12.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2387	#FFFFFF	#000000	##FFFFFF
##1B2387	1.00	12.83	1.64	12.83
#FFFFFF	12.83	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378A

Deuteranopia (green-blind)

#002D85

Tritanopia (blue-blind)

#004052

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2387;
/* rgb */ color: rgb(27, 35, 135);
/* oklch */ color: oklch(33.1% 0.163 270.2);

Tailwind

colors: {
  custom: {
    50: '#6c5fab',
    500: '#1b2387',
    950: '#000000',
  },
}

SCSS

$custom: #1b2387;
$custom-light: #6c5fab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2387",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 135
  },
  "hsl": {
    "h": 235.556,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.33106,
    "c": 0.16259,
    "h": 270.2
  },
  "luminance": 0.03184
}

Semantic roles & 50–950 ramp

primary

#1B2387

secondary

#BAB144

accent

#DD3EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B2387

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

Preview Lab → · Contrast checker → · Palette generator →