#1B347F#1B347F

#1B347F is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.131 H 265.9°. Best body text is #FFFFFF at 11.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B347F
RGB	rgb(27, 52, 127)
HSL	hsl(225, 65%, 30%)
HSV	hsv(225, 79%, 50%)
CMYK	cmyk(78.7%, 59.1%, 0%, 50.2%)
CIE-LAB	lab(24.39, 19.42, -45.18)
CIE-LCH	lch(24.39, 49.17, 293.26°)
OKLab	oklab(35.53% -0.0094 -0.1304)
OKLCH	oklch(35.53% 0.131 265.9)
XYZ	xyz(5.5094, 4.2207, 20.5989)
Luminance	0.0422 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B347F #7F661B

analogous

#1B667F #1B347F #341B7F

triadic

#1B347F #7F1B34 #347F1B

tetradic

#1B347F #7F1B66 #7F661B #1B7F34

square

#1B347F #7F1B66 #7F661B #1B7F34

split-complementary

#1B347F #7F341B #667F1B

monochromatic

#060B1A #101F4D #1B347F #2649B1 #3E64D6

Accessibility & contrast

On white

11.39

#1B347F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B347F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B347F

11.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B347F	#FFFFFF	#000000	##FFFFFF
##1B347F	1.00	11.39	1.84	11.39
#FFFFFF	11.39	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F82

Deuteranopia (green-blind)

#00357E

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b347f;
/* rgb */ color: rgb(27, 52, 127);
/* oklch */ color: oklch(35.5% 0.131 265.9);

Tailwind

colors: {
  custom: {
    50: '#686ba5',
    500: '#1b347f',
    950: '#000000',
  },
}

SCSS

$custom: #1b347f;
$custom-light: #686ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b347f",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 127
  },
  "hsl": {
    "h": 225,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.35534,
    "c": 0.13072,
    "h": 265.9
  },
  "luminance": 0.04221
}

Semantic roles & 50–950 ramp

primary

#1B347F

secondary

#B39743

accent

#BE40E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B347F

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

Preview Lab → · Contrast checker → · Palette generator →