#1B347B#1B347B

#1B347B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.2% C 0.125 H 265.6°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B347B
RGB	rgb(27, 52, 123)
HSL	hsl(224, 64%, 29%)
HSV	hsv(224, 78%, 48%)
CMYK	cmyk(78%, 57.7%, 0%, 51.8%)
CIE-LAB	lab(24.06, 17.80, -43.19)
CIE-LCH	lch(24.06, 46.71, 292.39°)
OKLab	oklab(35.18% -0.0096 -0.1245)
OKLCH	oklch(35.18% 0.125 265.6)
XYZ	xyz(5.2539, 4.1185, 19.2531)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B347B #7B621B

analogous

#1B647B #1B347B #321B7B

triadic

#1B347B #7B1B34 #347B1B

tetradic

#1B347B #7B1B64 #7B621B #1B7B32

square

#1B347B #7B1B64 #7B621B #1B7B32

split-complementary

#1B347B #7B321B #647B1B

monochromatic

#060B19 #101F49 #1B347B #2649AD #3C64D4

Accessibility & contrast

On white

11.51

#1B347B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1B347B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B347B

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B347B	#FFFFFF	#000000	##FFFFFF
##1B347B	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7D

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004552

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b347b;
/* rgb */ color: rgb(27, 52, 123);
/* oklch */ color: oklch(35.2% 0.125 265.6);

Tailwind

colors: {
  custom: {
    50: '#676ba2',
    500: '#1b347b',
    950: '#000000',
  },
}

SCSS

$custom: #1b347b;
$custom-light: #676ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b347b",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 123
  },
  "hsl": {
    "h": 224.375,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.35184,
    "c": 0.1249,
    "h": 265.6
  },
  "luminance": 0.04119
}

Semantic roles & 50–950 ramp

primary

#1B347B

secondary

#AF9343

accent

#BC41E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B347B

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

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