#1B3182#1B3182

#1B3182 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.2% C 0.139 H 267.1°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#1B3182
RGB	rgb(27, 49, 130)
HSL	hsl(227, 66%, 31%)
HSV	hsv(227, 79%, 51%)
CMYK	cmyk(79.2%, 62.3%, 0%, 49%)
CIE-LAB	lab(23.81, 22.73, -48.01)
CIE-LCH	lch(23.81, 53.12, 295.33°)
OKLab	oklab(35.18% -0.0071 -0.1388)
OKLCH	oklch(35.18% 0.139 267.1)
XYZ	xyz(5.5782, 4.0407, 21.6007)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3182 #826C1B

analogous

#1B6482 #1B3182 #381B82

triadic

#1B3182 #821B31 #31821B

tetradic

#1B3182 #821B64 #826C1B #1B8238

square

#1B3182 #821B64 #826C1B #1B8238

split-complementary

#1B3182 #82381B #64821B

monochromatic

#060B1D #101E4F #1B3182 #2644B5 #4060D7

Accessibility & contrast

On white

11.61

#1B3182 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B3182 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3182

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3182	#FFFFFF	#000000	##FFFFFF
##1B3182	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E85

Deuteranopia (green-blind)

#003480

Tritanopia (blue-blind)

#004654

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3182;
/* rgb */ color: rgb(27, 49, 130);
/* oklch */ color: oklch(35.2% 0.139 267.1);

Tailwind

colors: {
  custom: {
    50: '#6968a7',
    500: '#1b3182',
    950: '#000000',
  },
}

SCSS

$custom: #1b3182;
$custom-light: #6968a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3182",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 130
  },
  "hsl": {
    "h": 227.184,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35179,
    "c": 0.13893,
    "h": 267.1
  },
  "luminance": 0.04041
}

Semantic roles & 50–950 ramp

primary

#1B3182

secondary

#B69D43

accent

#C43FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B3182

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

Preview Lab → · Contrast checker → · Palette generator →