#1B3887#1B3887

#1B3887 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.137 H 265.0°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B3887
RGB	rgb(27, 56, 135)
HSL	hsl(224, 67%, 32%)
HSV	hsv(224, 80%, 53%)
CMYK	cmyk(80%, 58.5%, 0%, 47.1%)
CIE-LAB	lab(26.19, 19.85, -47.26)
CIE-LCH	lch(26.19, 51.26, 292.78°)
OKLab	oklab(37.09% -0.0119 -0.1364)
OKLCH	oklch(37.09% 0.137 265)
XYZ	xyz(6.2378, 4.8099, 23.5166)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3887 #876A1B

analogous

#1B6E87 #1B3887 #341B87

triadic

#1B3887 #871B38 #38871B

tetradic

#1B3887 #871B6E #876A1B #1B8734

square

#1B3887 #871B6E #876A1B #1B8734

split-complementary

#1B3887 #87341B #6E871B

monochromatic

#070E21 #112354 #1B3887 #254DBA #436BD9

Accessibility & contrast

On white

10.70

#1B3887 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1B3887 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3887

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3887	#FFFFFF	#000000	##FFFFFF
##1B3887	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438A

Deuteranopia (green-blind)

#003985

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3887;
/* rgb */ color: rgb(27, 56, 135);
/* oklch */ color: oklch(37.1% 0.137 265.0);

Tailwind

colors: {
  custom: {
    50: '#6a6eab',
    500: '#1b3887',
    950: '#000000',
  },
}

SCSS

$custom: #1b3887;
$custom-light: #6a6eab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3887",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 135
  },
  "hsl": {
    "h": 223.889,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37093,
    "c": 0.13695,
    "h": 265
  },
  "luminance": 0.04811
}

Semantic roles & 50–950 ramp

primary

#1B3887

secondary

#BA9A44

accent

#BC3EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3887

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

Preview Lab → · Contrast checker → · Palette generator →