#1B3C87#1B3C87

#1B3C87 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.0% C 0.132 H 263.5°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C87
RGB	rgb(27, 60, 135)
HSL	hsl(222, 67%, 32%)
HSV	hsv(222, 80%, 53%)
CMYK	cmyk(80%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(27.33, 17.05, -45.40)
CIE-LCH	lch(27.33, 48.49, 290.58°)
OKLab	oklab(37.96% -0.0149 -0.1309)
OKLCH	oklch(37.96% 0.132 263.5)
XYZ	xyz(6.4395, 5.2133, 23.5838)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C87 #87661B

analogous

#1B7287 #1B3C87 #301B87

triadic

#1B3C87 #871B3C #3C871B

tetradic

#1B3C87 #871B72 #87661B #1B8730

square

#1B3C87 #871B72 #87661B #1B8730

split-complementary

#1B3C87 #87301B #72871B

monochromatic

#070F21 #112554 #1B3C87 #2553BA #4371D9

Accessibility & contrast

On white

10.28

#1B3C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1B3C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C87

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C87	#FFFFFF	#000000	##FFFFFF
##1B3C87	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468A

Deuteranopia (green-blind)

#003C86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3c87;
/* rgb */ color: rgb(27, 60, 135);
/* oklch */ color: oklch(38.0% 0.132 263.5);

Tailwind

colors: {
  custom: {
    50: '#6a71ab',
    500: '#1b3c87',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c87;
$custom-light: #6a71ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c87",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 221.667,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37959,
    "c": 0.13173,
    "h": 263.5
  },
  "luminance": 0.05214
}

Semantic roles & 50–950 ramp

primary

#1B3C87

secondary

#BA9644

accent

#B53EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3C87

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

Preview Lab → · Contrast checker → · Palette generator →