#1B3186#1B3186

#1B3186 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.6% C 0.145 H 267.2°. Best body text is #FFFFFF at 11.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B3186
RGB	rgb(27, 49, 134)
HSL	hsl(228, 66%, 32%)
HSV	hsv(228, 80%, 53%)
CMYK	cmyk(79.9%, 63.4%, 0%, 47.5%)
CIE-LAB	lab(24.16, 24.32, -49.94)
CIE-LCH	lch(24.16, 55.55, 295.97°)
OKLab	oklab(35.56% -0.0071 -0.1444)
OKLCH	oklch(35.56% 0.145 267.2)
XYZ	xyz(5.8519, 4.1502, 23.0423)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3186 #86701B

analogous

#1B6786 #1B3186 #3B1B86

triadic

#1B3186 #861B31 #31861B

tetradic

#1B3186 #861B67 #86701B #1B863B

square

#1B3186 #861B67 #86701B #1B863B

split-complementary

#1B3186 #863B1B #67861B

monochromatic

#060C20 #111E53 #1B3186 #2544B9 #4261D9

Accessibility & contrast

On white

11.47

#1B3186 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1B3186 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3186

11.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3186	#FFFFFF	#000000	##FFFFFF
##1B3186	1.00	11.47	1.83	11.47
#FFFFFF	11.47	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F89

Deuteranopia (green-blind)

#003584

Tritanopia (blue-blind)

#004756

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3186;
/* rgb */ color: rgb(27, 49, 134);
/* oklch */ color: oklch(35.6% 0.145 267.2);

Tailwind

colors: {
  custom: {
    50: '#6a68aa',
    500: '#1b3186',
    950: '#000000',
  },
}

SCSS

$custom: #1b3186;
$custom-light: #6a68aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3186",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 134
  },
  "hsl": {
    "h": 227.664,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.35555,
    "c": 0.14457,
    "h": 267.2
  },
  "luminance": 0.04151
}

Semantic roles & 50–950 ramp

primary

#1B3186

secondary

#B9A144

accent

#C63EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3186

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

Preview Lab → · Contrast checker → · Palette generator →