#1B3D89#1B3D89

#1B3D89 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.133 H 263.3°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D89
RGB	rgb(27, 61, 137)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 54%)
CMYK	cmyk(80.3%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(27.78, 17.16, -45.91)
CIE-LCH	lch(27.78, 49.02, 290.50°)
OKLab	oklab(38.35% -0.0155 -0.1324)
OKLCH	oklch(38.35% 0.133 263.3)
XYZ	xyz(6.6345, 5.3759, 24.3500)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D89 #89671B

analogous

#1B7489 #1B3D89 #301B89

triadic

#1B3D89 #891B3D #3D891B

tetradic

#1B3D89 #891B74 #89671B #1B8930

square

#1B3D89 #891B74 #89671B #1B8930

split-complementary

#1B3D89 #89301B #74891B

monochromatic

#070F23 #112656 #1B3D89 #2554BC #4473DA

Accessibility & contrast

On white

10.12

#1B3D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B3D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D89

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D89	#FFFFFF	#000000	##FFFFFF
##1B3D89	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3d89;
/* rgb */ color: rgb(27, 61, 137);
/* oklch */ color: oklch(38.3% 0.133 263.3);

Tailwind

colors: {
  custom: {
    50: '#6a71ac',
    500: '#1b3d89',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d89;
$custom-light: #6a71ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d89",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 221.455,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38346,
    "c": 0.13329,
    "h": 263.3
  },
  "luminance": 0.05377
}

Semantic roles & 50–950 ramp

primary

#1B3D89

secondary

#BC9744

accent

#B53EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3D89

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

Preview Lab → · Contrast checker → · Palette generator →