#1B3D87#1B3D87

#1B3D87 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.130 H 263.1°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D87
RGB	rgb(27, 61, 135)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 53%)
CMYK	cmyk(80%, 54.8%, 0%, 47.1%)
CIE-LAB	lab(27.62, 16.35, -44.93)
CIE-LCH	lch(27.62, 47.81, 290.00°)
OKLab	oklab(38.18% -0.0157 -0.1295)
OKLCH	oklch(38.18% 0.13 263.1)
XYZ	xyz(6.4923, 5.3190, 23.6015)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D87 #87651B

analogous

#1B7387 #1B3D87 #2F1B87

triadic

#1B3D87 #871B3D #3D871B

tetradic

#1B3D87 #871B73 #87651B #1B872F

square

#1B3D87 #871B73 #87651B #1B872F

split-complementary

#1B3D87 #872F1B #73871B

monochromatic

#070F21 #112654 #1B3D87 #2554BA #4372D9

Accessibility & contrast

On white

10.17

#1B3D87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B3D87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D87

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D87	#FFFFFF	#000000	##FFFFFF
##1B3D87	1.00	10.17	2.06	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04468A

Deuteranopia (green-blind)

#003D86

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3d87;
/* rgb */ color: rgb(27, 61, 135);
/* oklch */ color: oklch(38.2% 0.130 263.1);

Tailwind

colors: {
  custom: {
    50: '#6971ab',
    500: '#1b3d87',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d87;
$custom-light: #6971ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d87",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 135
  },
  "hsl": {
    "h": 221.111,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.3818,
    "c": 0.13042,
    "h": 263.1
  },
  "luminance": 0.0532
}

Semantic roles & 50–950 ramp

primary

#1B3D87

secondary

#BA9544

accent

#B43EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3D87

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

Preview Lab → · Contrast checker → · Palette generator →