#1B3374#1B3374

#1B3374 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.4% C 0.116 H 265.4°. Best body text is #FFFFFF at 11.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B3374
RGB	rgb(27, 51, 116)
HSL	hsl(224, 62%, 28%)
HSV	hsv(224, 77%, 45%)
CMYK	cmyk(76.7%, 56%, 0%, 54.5%)
CIE-LAB	lab(23.21, 15.65, -40.12)
CIE-LCH	lch(23.21, 43.07, 291.31°)
OKLab	oklab(34.36% -0.0093 -0.1155)
OKLCH	oklch(34.36% 0.116 265.4)
XYZ	xyz(4.7871, 3.8611, 17.0126)
Luminance	0.0386 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3374 #745C1B

analogous

#1B5F74 #1B3374 #2F1B74

triadic

#1B3374 #741B33 #33741B

tetradic

#1B3374 #741B5F #745C1B #1B742F

square

#1B3374 #741B5F #745C1B #1B742F

split-complementary

#1B3374 #742F1B #5F741B

monochromatic

#060B19 #0F1D42 #1B3374 #2749A6 #3962D1

Accessibility & contrast

On white

11.85

#1B3374 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B3374 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3374

11.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3374	#FFFFFF	#000000	##FFFFFF
##1B3374	1.00	11.85	1.77	11.85
#FFFFFF	11.85	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#023C76

Deuteranopia (green-blind)

#003373

Tritanopia (blue-blind)

#00434E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b3374;
/* rgb */ color: rgb(27, 51, 116);
/* oklch */ color: oklch(34.4% 0.116 265.4);

Tailwind

colors: {
  custom: {
    50: '#656a9d',
    500: '#1b3374',
    950: '#000000',
  },
}

SCSS

$custom: #1b3374;
$custom-light: #656a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3374",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 116
  },
  "hsl": {
    "h": 223.82,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.34364,
    "c": 0.11591,
    "h": 265.4
  },
  "luminance": 0.03862
}

Semantic roles & 50–950 ramp

primary

#1B3374

secondary

#A98D42

accent

#B942E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3374

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

Preview Lab → · Contrast checker → · Palette generator →