#1B3786#1B3786

#1B3786 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.137 H 265.3°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#1B3786
RGB	rgb(27, 55, 134)
HSL	hsl(224, 66%, 32%)
HSV	hsv(224, 80%, 53%)
CMYK	cmyk(79.9%, 59%, 0%, 47.5%)
CIE-LAB	lab(25.82, 20.14, -47.23)
CIE-LCH	lch(25.82, 51.35, 293.09°)
OKLab	oklab(36.79% -0.0112 -0.1364)
OKLCH	oklch(36.79% 0.137 265.3)
XYZ	xyz(6.1197, 4.6859, 23.1316)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3786 #866A1B

analogous

#1B6D86 #1B3786 #351B86

triadic

#1B3786 #861B37 #37861B

tetradic

#1B3786 #861B6D #866A1B #1B8635

square

#1B3786 #861B6D #866A1B #1B8635

split-complementary

#1B3786 #86351B #6D861B

monochromatic

#060D20 #112253 #1B3786 #254CB9 #426AD9

Accessibility & contrast

On white

10.84

#1B3786 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1B3786 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3786

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3786	#FFFFFF	#000000	##FFFFFF
##1B3786	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004289

Deuteranopia (green-blind)

#003884

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3786;
/* rgb */ color: rgb(27, 55, 134);
/* oklch */ color: oklch(36.8% 0.137 265.3);

Tailwind

colors: {
  custom: {
    50: '#6a6daa',
    500: '#1b3786',
    950: '#000000',
  },
}

SCSS

$custom: #1b3786;
$custom-light: #6a6daa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3786",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 134
  },
  "hsl": {
    "h": 224.299,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.36792,
    "c": 0.13683,
    "h": 265.3
  },
  "luminance": 0.04687
}

Semantic roles & 50–950 ramp

primary

#1B3786

secondary

#B99A44

accent

#BD3EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3786

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

Preview Lab → · Contrast checker → · Palette generator →