#1B3382#1B3382

#1B3382 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.6% C 0.136 H 266.4°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B3382
RGB	rgb(27, 51, 130)
HSL	hsl(226, 66%, 31%)
HSV	hsv(226, 79%, 51%)
CMYK	cmyk(79.2%, 60.8%, 0%, 49%)
CIE-LAB	lab(24.36, 21.33, -47.11)
CIE-LCH	lch(24.36, 51.72, 294.36°)
OKLab	oklab(35.59% -0.0085 -0.1361)
OKLCH	oklch(35.59% 0.136 266.4)
XYZ	xyz(5.6637, 4.2117, 21.6292)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3382 #826A1B

analogous

#1B6682 #1B3382 #361B82

triadic

#1B3382 #821B33 #33821B

tetradic

#1B3382 #821B66 #826A1B #1B8236

square

#1B3382 #821B66 #826A1B #1B8236

split-complementary

#1B3382 #82361B #66821B

monochromatic

#060B1D #101F4F #1B3382 #2647B5 #4063D7

Accessibility & contrast

On white

11.40

#1B3382 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B3382 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3382

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3382	#FFFFFF	#000000	##FFFFFF
##1B3382	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F85

Deuteranopia (green-blind)

#003580

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3382;
/* rgb */ color: rgb(27, 51, 130);
/* oklch */ color: oklch(35.6% 0.136 266.4);

Tailwind

colors: {
  custom: {
    50: '#696aa7',
    500: '#1b3382',
    950: '#000000',
  },
}

SCSS

$custom: #1b3382;
$custom-light: #696aa7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3382",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 130
  },
  "hsl": {
    "h": 226.019,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35592,
    "c": 0.13634,
    "h": 266.4
  },
  "luminance": 0.04212
}

Semantic roles & 50–950 ramp

primary

#1B3382

secondary

#B69B43

accent

#C13FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B3382

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

Preview Lab → · Contrast checker → · Palette generator →