#1B3D8A#1B3D8A

#1B3D8A is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.135 H 263.4°. Best body text is #FFFFFF at 10.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D8A
RGB	rgb(27, 61, 138)
HSL	hsl(222, 67%, 32%)
HSV	hsv(222, 80%, 54%)
CMYK	cmyk(80.4%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(27.86, 17.57, -46.41)
CIE-LCH	lch(27.86, 49.62, 290.74°)
OKLab	oklab(38.43% -0.0154 -0.1338)
OKLCH	oklch(38.43% 0.135 263.4)
XYZ	xyz(6.7065, 5.4047, 24.7296)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D8A #8A681B

analogous

#1B748A #1B3D8A #311B8A

triadic

#1B3D8A #8A1B3D #3D8A1B

tetradic

#1B3D8A #8A1B74 #8A681B #1B8A31

square

#1B3D8A #8A1B74 #8A681B #1B8A31

split-complementary

#1B3D8A #8A311B #748A1B

monochromatic

#071024 #112657 #1B3D8A #2554BD #4573DB

Accessibility & contrast

On white

10.09

#1B3D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B3D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D8A

10.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D8A	#FFFFFF	#000000	##FFFFFF
##1B3D8A	1.00	10.09	2.08	10.09
#FFFFFF	10.09	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3d8a;
/* rgb */ color: rgb(27, 61, 138);
/* oklch */ color: oklch(38.4% 0.135 263.4);

Tailwind

colors: {
  custom: {
    50: '#6a71ad',
    500: '#1b3d8a',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d8a;
$custom-light: #6a71ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d8a",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 221.622,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3843,
    "c": 0.13471,
    "h": 263.4
  },
  "luminance": 0.05405
}

Semantic roles & 50–950 ramp

primary

#1B3D8A

secondary

#BC9745

accent

#B53EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3D8A

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

Preview Lab → · Contrast checker → · Palette generator →