#1B3082#1B3082

#1B3082 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.140 H 267.4°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B3082
RGB	rgb(27, 48, 130)
HSL	hsl(228, 66%, 31%)
HSV	hsv(228, 79%, 51%)
CMYK	cmyk(79.2%, 63.1%, 0%, 49%)
CIE-LAB	lab(23.53, 23.43, -48.46)
CIE-LCH	lch(23.53, 53.83, 295.80°)
OKLab	oklab(34.98% -0.0064 -0.1401)
OKLCH	oklch(34.98% 0.14 267.4)
XYZ	xyz(5.5368, 3.9580, 21.5869)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3082 #826D1B

analogous

#1B6382 #1B3082 #391B82

triadic

#1B3082 #821B30 #30821B

tetradic

#1B3082 #821B63 #826D1B #1B8239

square

#1B3082 #821B63 #826D1B #1B8239

split-complementary

#1B3082 #82391B #63821B

monochromatic

#060B1D #101D4F #1B3082 #2643B5 #405FD7

Accessibility & contrast

On white

11.72

#1B3082 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B3082 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3082

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3082	#FFFFFF	#000000	##FFFFFF
##1B3082	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D85

Deuteranopia (green-blind)

#003380

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b3082;
/* rgb */ color: rgb(27, 48, 130);
/* oklch */ color: oklch(35.0% 0.140 267.4);

Tailwind

colors: {
  custom: {
    50: '#6968a7',
    500: '#1b3082',
    950: '#000000',
  },
}

SCSS

$custom: #1b3082;
$custom-light: #6968a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3082",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 130
  },
  "hsl": {
    "h": 227.767,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.34976,
    "c": 0.14022,
    "h": 267.4
  },
  "luminance": 0.03959
}

Semantic roles & 50–950 ramp

primary

#1B3082

secondary

#B69E43

accent

#C63FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B3082

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

Preview Lab → · Contrast checker → · Palette generator →