#1B3288#1B3288

#1B3288 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.146 H 267.0°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B3288
RGB	rgb(27, 50, 136)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 53%)
CMYK	cmyk(80.1%, 63.2%, 0%, 46.7%)
CIE-LAB	lab(24.61, 24.42, -50.45)
CIE-LCH	lch(24.61, 56.05, 295.83°)
OKLab	oklab(35.94% -0.0077 -0.1459)
OKLCH	oklch(35.94% 0.146 267)
XYZ	xyz(6.0350, 4.2911, 23.7980)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3288 #88711B

analogous

#1B6988 #1B3288 #3A1B88

triadic

#1B3288 #881B32 #32881B

tetradic

#1B3288 #881B69 #88711B #1B883A

square

#1B3288 #881B69 #88711B #1B883A

split-complementary

#1B3288 #883A1B #69881B

monochromatic

#070C22 #111F55 #1B3288 #2545BB #4463DA

Accessibility & contrast

On white

11.30

#1B3288 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B3288 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3288

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3288	#FFFFFF	#000000	##FFFFFF
##1B3288	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408B

Deuteranopia (green-blind)

#003586

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3288;
/* rgb */ color: rgb(27, 50, 136);
/* oklch */ color: oklch(35.9% 0.146 267.0);

Tailwind

colors: {
  custom: {
    50: '#6b69ab',
    500: '#1b3288',
    950: '#000000',
  },
}

SCSS

$custom: #1b3288;
$custom-light: #6b69ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3288",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 136
  },
  "hsl": {
    "h": 227.339,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.35943,
    "c": 0.1461,
    "h": 267
  },
  "luminance": 0.04292
}

Semantic roles & 50–950 ramp

primary

#1B3288

secondary

#BBA244

accent

#C63EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3288

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

Preview Lab → · Contrast checker → · Palette generator →