#1B4B9D#1B4B9D

#1B4B9D is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.1% C 0.144 H 260.5°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B9D
RGB	rgb(27, 75, 157)
HSL	hsl(218, 71%, 36%)
HSV	hsv(218, 83%, 62%)
CMYK	cmyk(82.8%, 52.2%, 0%, 38.4%)
CIE-LAB	lab(33.35, 15.63, -49.13)
CIE-LCH	lch(33.35, 51.55, 287.65°)
OKLab	oklab(43.06% -0.0238 -0.1415)
OKLCH	oklch(43.06% 0.144 260.5)
XYZ	xyz(9.0517, 7.6984, 32.9006)
Luminance	0.0770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B9D #9D6D1B

analogous

#1B8C9D #1B4B9D #2C1B9D

triadic

#1B4B9D #9D1B4B #4B9D1B

tetradic

#1B4B9D #9D1B8C #9D6D1B #1B9D2C

square

#1B4B9D #9D1B8C #9D6D1B #1B9D2C

split-complementary

#1B4B9D #9D2C1B #8C9D1B

monochromatic

#091935 #123269 #1B4B9D #2464D1 #5186E1

Accessibility & contrast

On white

8.27

#1B4B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1B4B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B9D

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B9D	#FFFFFF	#000000	##FFFFFF
##1B4B9D	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1355A0

Deuteranopia (green-blind)

#00499B

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4b9d;
/* rgb */ color: rgb(27, 75, 157);
/* oklch */ color: oklch(43.1% 0.144 260.5);

Tailwind

colors: {
  custom: {
    50: '#6e7cbb',
    500: '#1b4b9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b9d;
$custom-light: #6e7cbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b9d",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 157
  },
  "hsl": {
    "h": 217.846,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43058,
    "c": 0.14353,
    "h": 260.5
  },
  "luminance": 0.07699
}

Semantic roles & 50–950 ramp

primary

#1B4B9D

secondary

#C49950

accent

#AB3AED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080912

muted

#7B7B81

Preview Lab

Preview with #1B4B9D

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

Preview Lab → · Contrast checker → · Palette generator →