#1B3E9E#1B3E9E

#1B3E9E is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.161 H 264.7°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E9E
RGB	rgb(27, 62, 158)
HSL	hsl(224, 71%, 36%)
HSV	hsv(224, 83%, 62%)
CMYK	cmyk(82.9%, 60.8%, 0%, 38%)
CIE-LAB	lab(29.78, 24.90, -55.53)
CIE-LCH	lch(29.78, 60.86, 294.15°)
OKLab	oklab(40.39% -0.0149 -0.1606)
OKLCH	oklch(40.39% 0.161 264.7)
XYZ	xyz(8.3440, 6.1459, 33.0876)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E9E #9E7B1B

analogous

#1B809E #1B3E9E #391B9E

triadic

#1B3E9E #9E1B3E #3E9E1B

tetradic

#1B3E9E #9E1B80 #9E7B1B #1B9E39

square

#1B3E9E #9E1B80 #9E7B1B #1B9E39

split-complementary

#1B3E9E #9E391B #809E1B

monochromatic

#091535 #12296A #1B3E9E #2453D2 #5278E1

Accessibility & contrast

On white

9.42

#1B3E9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1B3E9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E9E

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E9E	#FFFFFF	#000000	##FFFFFF
##1B3E9E	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3e9e;
/* rgb */ color: rgb(27, 62, 158);
/* oklch */ color: oklch(40.4% 0.161 264.7);

Tailwind

colors: {
  custom: {
    50: '#6f72bb',
    500: '#1b3e9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e9e;
$custom-light: #6f72bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e9e",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 158
  },
  "hsl": {
    "h": 223.969,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40386,
    "c": 0.16131,
    "h": 264.7
  },
  "luminance": 0.06147
}

Semantic roles & 50–950 ramp

primary

#1B3E9E

secondary

#C4A551

accent

#BE3AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B3E9E

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

Preview Lab → · Contrast checker → · Palette generator →