#1B339E#1B339E

#1B339E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.3% C 0.175 H 267.0°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B339E
RGB	rgb(27, 51, 158)
HSL	hsl(229, 71%, 36%)
HSV	hsv(229, 83%, 62%)
CMYK	cmyk(82.9%, 67.7%, 0%, 38%)
CIE-LAB	lab(26.93, 32.29, -60.20)
CIE-LCH	lch(26.93, 68.32, 298.21°)
OKLab	oklab(38.28% -0.009 -0.1744)
OKLCH	oklch(38.28% 0.175 267)
XYZ	xyz(7.8052, 5.0684, 32.9080)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B339E #9E861B

analogous

#1B759E #1B339E #451B9E

triadic

#1B339E #9E1B33 #339E1B

tetradic

#1B339E #9E1B75 #9E861B #1B9E45

square

#1B339E #9E1B75 #9E861B #1B9E45

split-complementary

#1B339E #9E451B #759E1B

monochromatic

#091135 #12226A #1B339E #2444D2 #526CE1

Accessibility & contrast

On white

10.43

#1B339E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B339E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B339E

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B339E	#FFFFFF	#000000	##FFFFFF
##1B339E	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046A1

Deuteranopia (green-blind)

#00399C

Tritanopia (blue-blind)

#005064

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b339e;
/* rgb */ color: rgb(27, 51, 158);
/* oklch */ color: oklch(38.3% 0.175 267.0);

Tailwind

colors: {
  custom: {
    50: '#706abc',
    500: '#1b339e',
    950: '#000000',
  },
}

SCSS

$custom: #1b339e;
$custom-light: #706abc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b339e",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 158
  },
  "hsl": {
    "h": 229.008,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.3828,
    "c": 0.17463,
    "h": 267
  },
  "luminance": 0.05069
}

Semantic roles & 50–950 ramp

primary

#1B339E

secondary

#C4AF51

accent

#CD3AEE

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B339E

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

Preview Lab → · Contrast checker → · Palette generator →