#1B4A9B#1B4A9B

#1B4A9B is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.7% C 0.142 H 260.6°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A9B
RGB	rgb(27, 74, 155)
HSL	hsl(218, 70%, 36%)
HSV	hsv(218, 83%, 61%)
CMYK	cmyk(82.6%, 52.3%, 0%, 39.2%)
CIE-LAB	lab(32.91, 15.50, -48.62)
CIE-LCH	lch(32.91, 51.04, 287.68°)
OKLab	oklab(42.68% -0.0233 -0.1401)
OKLCH	oklch(42.68% 0.142 260.6)
XYZ	xyz(8.8150, 7.4961, 31.9863)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A9B #9B6C1B

analogous

#1B8A9B #1B4A9B #2C1B9B

triadic

#1B4A9B #9B1B4A #4A9B1B

tetradic

#1B4A9B #9B1B8A #9B6C1B #1B9B2C

square

#1B4A9B #9B1B8A #9B6C1B #1B9B2C

split-complementary

#1B4A9B #9B2C1B #8A9B1B

monochromatic

#091833 #123167 #1B4A9B #2463CF #5085E0

Accessibility & contrast

On white

8.40

#1B4A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B4A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A9B

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A9B	#FFFFFF	#000000	##FFFFFF
##1B4A9B	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13549E

Deuteranopia (green-blind)

#004899

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4a9b;
/* rgb */ color: rgb(27, 74, 155);
/* oklch */ color: oklch(42.7% 0.142 260.6);

Tailwind

colors: {
  custom: {
    50: '#6e7bb9',
    500: '#1b4a9b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a9b;
$custom-light: #6e7bb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a9b",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 155
  },
  "hsl": {
    "h": 217.969,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.42679,
    "c": 0.14201,
    "h": 260.6
  },
  "luminance": 0.07497
}

Semantic roles & 50–950 ramp

primary

#1B4A9B

secondary

#C3984F

accent

#AC3BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4A9B

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

Preview Lab → · Contrast checker → · Palette generator →