#1B3F86#1B3F86

#1B3F86 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.126 H 262.1°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F86
RGB	rgb(27, 63, 134)
HSL	hsl(220, 66%, 32%)
HSV	hsv(220, 80%, 53%)
CMYK	cmyk(79.9%, 53%, 0%, 47.5%)
CIE-LAB	lab(28.14, 14.55, -43.48)
CIE-LCH	lch(28.14, 45.84, 288.50°)
OKLab	oklab(38.55% -0.0174 -0.1252)
OKLCH	oklch(38.55% 0.126 262.1)
XYZ	xyz(6.5310, 5.5085, 23.2687)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F86 #86621B

analogous

#1B7586 #1B3F86 #2D1B86

triadic

#1B3F86 #861B3F #3F861B

tetradic

#1B3F86 #861B75 #86621B #1B862D

square

#1B3F86 #861B75 #86621B #1B862D

split-complementary

#1B3F86 #862D1B #75861B

monochromatic

#060F20 #112753 #1B3F86 #2557B9 #4275D9

Accessibility & contrast

On white

9.99

#1B3F86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B3F86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F86

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F86	#FFFFFF	#000000	##FFFFFF
##1B3F86	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104889

Deuteranopia (green-blind)

#003E85

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3f86;
/* rgb */ color: rgb(27, 63, 134);
/* oklch */ color: oklch(38.5% 0.126 262.1);

Tailwind

colors: {
  custom: {
    50: '#6973aa',
    500: '#1b3f86',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f86;
$custom-light: #6973aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f86",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 134
  },
  "hsl": {
    "h": 219.813,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38545,
    "c": 0.12637,
    "h": 262.1
  },
  "luminance": 0.05509
}

Semantic roles & 50–950 ramp

primary

#1B3F86

secondary

#B99244

accent

#B03EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3F86

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

Preview Lab → · Contrast checker → · Palette generator →