#1B3473#1B3473

#1B3473 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.5% C 0.113 H 264.8°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B3473
RGB	rgb(27, 52, 115)
HSL	hsl(223, 62%, 28%)
HSV	hsv(223, 77%, 45%)
CMYK	cmyk(76.5%, 54.8%, 0%, 54.9%)
CIE-LAB	lab(23.43, 14.53, -39.13)
CIE-LCH	lch(23.43, 41.74, 290.37°)
OKLab	oklab(34.51% -0.0103 -0.1126)
OKLCH	oklch(34.51% 0.113 264.8)
XYZ	xyz(4.7734, 3.9263, 16.7226)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3473 #735A1B

analogous

#1B6073 #1B3473 #2E1B73

triadic

#1B3473 #731B34 #34731B

tetradic

#1B3473 #731B60 #735A1B #1B732E

square

#1B3473 #731B60 #735A1B #1B732E

split-complementary

#1B3473 #732E1B #60731B

monochromatic

#060B19 #0F1E41 #1B3473 #274AA5 #3863D0

Accessibility & contrast

On white

11.76

#1B3473 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B3473 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3473

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3473	#FFFFFF	#000000	##FFFFFF
##1B3473	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#093C75

Deuteranopia (green-blind)

#003472

Tritanopia (blue-blind)

#00434E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b3473;
/* rgb */ color: rgb(27, 52, 115);
/* oklch */ color: oklch(34.5% 0.113 264.8);

Tailwind

colors: {
  custom: {
    50: '#656b9c',
    500: '#1b3473',
    950: '#000000',
  },
}

SCSS

$custom: #1b3473;
$custom-light: #656b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3473",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 115
  },
  "hsl": {
    "h": 222.955,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34505,
    "c": 0.11306,
    "h": 264.8
  },
  "luminance": 0.03927
}

Semantic roles & 50–950 ramp

primary

#1B3473

secondary

#A88B42

accent

#B743E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3473

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

Preview Lab → · Contrast checker → · Palette generator →