#1B3394#1B3394

#1B3394 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.3% C 0.161 H 267.0°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B3394
RGB	rgb(27, 51, 148)
HSL	hsl(228, 69%, 34%)
HSV	hsv(228, 82%, 58%)
CMYK	cmyk(81.8%, 65.5%, 0%, 42%)
CIE-LAB	lab(25.97, 28.45, -55.65)
CIE-LCH	lch(25.97, 62.50, 297.08°)
OKLab	oklab(37.29% -0.0085 -0.1611)
OKLCH	oklch(37.29% 0.161 267)
XYZ	xyz(6.9792, 4.7380, 28.5579)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3394 #947C1B

analogous

#1B7094 #1B3394 #401B94

triadic

#1B3394 #941B33 #33941B

tetradic

#1B3394 #941B70 #947C1B #1B9440

square

#1B3394 #941B70 #947C1B #1B9440

split-complementary

#1B3394 #94401B #70941B

monochromatic

#080F2C #122160 #1B3394 #2445C8 #4B68DE

Accessibility & contrast

On white

10.78

#1B3394 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B3394 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3394

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3394	#FFFFFF	#000000	##FFFFFF
##1B3394	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004397

Deuteranopia (green-blind)

#003892

Tritanopia (blue-blind)

#004D5E

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3394;
/* rgb */ color: rgb(27, 51, 148);
/* oklch */ color: oklch(37.3% 0.161 267.0);

Tailwind

colors: {
  custom: {
    50: '#6e6ab4',
    500: '#1b3394',
    950: '#000000',
  },
}

SCSS

$custom: #1b3394;
$custom-light: #6e6ab4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3394",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 148
  },
  "hsl": {
    "h": 228.099,
    "s": 69.143,
    "l": 34.314
  },
  "oklch": {
    "l": 0.3729,
    "c": 0.16133,
    "h": 267
  },
  "luminance": 0.04739
}

Semantic roles & 50–950 ramp

primary

#1B3394

secondary

#C0A94B

accent

#C93CEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B3394

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

Preview Lab → · Contrast checker → · Palette generator →