#1B3B87#1B3B87

#1B3B87 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.133 H 263.9°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B3B87
RGB	rgb(27, 59, 135)
HSL	hsl(222, 67%, 32%)
HSV	hsv(222, 80%, 53%)
CMYK	cmyk(80%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(27.04, 17.75, -45.87)
CIE-LCH	lch(27.04, 49.18, 291.15°)
OKLab	oklab(37.74% -0.0142 -0.1323)
OKLCH	oklch(37.74% 0.133 263.9)
XYZ	xyz(6.3876, 5.1095, 23.5666)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3B87 #87671B

analogous

#1B7187 #1B3B87 #311B87

triadic

#1B3B87 #871B3B #3B871B

tetradic

#1B3B87 #871B71 #87671B #1B8731

square

#1B3B87 #871B71 #87671B #1B8731

split-complementary

#1B3B87 #87311B #71871B

monochromatic

#070E21 #112554 #1B3B87 #2551BA #4370D9

Accessibility & contrast

On white

10.39

#1B3B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B3B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3B87

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3B87	#FFFFFF	#000000	##FFFFFF
##1B3B87	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458A

Deuteranopia (green-blind)

#003B86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3b87;
/* rgb */ color: rgb(27, 59, 135);
/* oklch */ color: oklch(37.7% 0.133 263.9);

Tailwind

colors: {
  custom: {
    50: '#6a70ab',
    500: '#1b3b87',
    950: '#000000',
  },
}

SCSS

$custom: #1b3b87;
$custom-light: #6a70ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3b87",
  "rgb": {
    "r": 27,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 222.222,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.3774,
    "c": 0.13304,
    "h": 263.9
  },
  "luminance": 0.0511
}

Semantic roles & 50–950 ramp

primary

#1B3B87

secondary

#BA9744

accent

#B73EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3B87

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

Preview Lab → · Contrast checker → · Palette generator →