#1B3886#1B3886

#1B3886 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.0% C 0.136 H 264.9°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B3886
RGB	rgb(27, 56, 134)
HSL	hsl(224, 66%, 32%)
HSV	hsv(224, 80%, 53%)
CMYK	cmyk(79.9%, 58.2%, 0%, 47.5%)
CIE-LAB	lab(26.10, 19.44, -46.77)
CIE-LCH	lch(26.10, 50.65, 292.57°)
OKLab	oklab(37% -0.012 -0.135)
OKLCH	oklch(37% 0.136 264.9)
XYZ	xyz(6.1677, 4.7819, 23.1476)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3886 #86691B

analogous

#1B6E86 #1B3886 #331B86

triadic

#1B3886 #861B38 #38861B

tetradic

#1B3886 #861B6E #86691B #1B8633

square

#1B3886 #861B6E #86691B #1B8633

split-complementary

#1B3886 #86331B #6E861B

monochromatic

#060D20 #112353 #1B3886 #254DB9 #426BD9

Accessibility & contrast

On white

10.73

#1B3886 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1B3886 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3886

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3886	#FFFFFF	#000000	##FFFFFF
##1B3886	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004389

Deuteranopia (green-blind)

#003984

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3886;
/* rgb */ color: rgb(27, 56, 134);
/* oklch */ color: oklch(37.0% 0.136 264.9);

Tailwind

colors: {
  custom: {
    50: '#6a6eaa',
    500: '#1b3886',
    950: '#000000',
  },
}

SCSS

$custom: #1b3886;
$custom-light: #6a6eaa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3886",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 134
  },
  "hsl": {
    "h": 223.738,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37005,
    "c": 0.13552,
    "h": 264.9
  },
  "luminance": 0.04783
}

Semantic roles & 50–950 ramp

primary

#1B3886

secondary

#B99944

accent

#BB3EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3886

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

Preview Lab → · Contrast checker → · Palette generator →