#1B339F#1B339F

#1B339F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.4% C 0.176 H 267.1°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B339F
RGB	rgb(27, 51, 159)
HSL	hsl(229, 71%, 36%)
HSV	hsv(229, 83%, 62%)
CMYK	cmyk(83%, 67.9%, 0%, 37.6%)
CIE-LAB	lab(27.03, 32.67, -60.65)
CIE-LCH	lch(27.03, 68.89, 298.31°)
OKLab	oklab(38.38% -0.009 -0.1757)
OKLCH	oklch(38.38% 0.176 267.1)
XYZ	xyz(7.8916, 5.1029, 33.3632)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B339F #9F871B

analogous

#1B759F #1B339F #451B9F

triadic

#1B339F #9F1B33 #339F1B

tetradic

#1B339F #9F1B75 #9F871B #1B9F45

square

#1B339F #9F1B75 #9F871B #1B9F45

split-complementary

#1B339F #9F451B #759F1B

monochromatic

#091136 #12226B #1B339F #2444D3 #536DE2

Accessibility & contrast

On white

10.39

#1B339F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B339F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B339F

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B339F	#FFFFFF	#000000	##FFFFFF
##1B339F	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046A2

Deuteranopia (green-blind)

#003A9D

Tritanopia (blue-blind)

#005064

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b339f;
/* rgb */ color: rgb(27, 51, 159);
/* oklch */ color: oklch(38.4% 0.176 267.1);

Tailwind

colors: {
  custom: {
    50: '#716abc',
    500: '#1b339f',
    950: '#000000',
  },
}

SCSS

$custom: #1b339f;
$custom-light: #716abc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b339f",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 159
  },
  "hsl": {
    "h": 229.091,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38381,
    "c": 0.17594,
    "h": 267.1
  },
  "luminance": 0.05104
}

Semantic roles & 50–950 ramp

primary

#1B339F

secondary

#C5B051

accent

#CD3AEE

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B339F

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

Preview Lab → · Contrast checker → · Palette generator →