#1B4C9D#1B4C9D

#1B4C9D is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.3% C 0.142 H 260.1°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B4C9D
RGB	rgb(27, 76, 157)
HSL	hsl(217, 71%, 36%)
HSV	hsv(217, 83%, 62%)
CMYK	cmyk(82.8%, 51.6%, 0%, 38.4%)
CIE-LAB	lab(33.64, 14.95, -48.66)
CIE-LCH	lch(33.64, 50.90, 287.08°)
OKLab	oklab(43.28% -0.0245 -0.1401)
OKLCH	oklch(43.28% 0.142 260.1)
XYZ	xyz(9.1200, 7.8351, 32.9234)
Luminance	0.0784 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4C9D #9D6C1B

analogous

#1B8D9D #1B4C9D #2B1B9D

triadic

#1B4C9D #9D1B4C #4C9D1B

tetradic

#1B4C9D #9D1B8D #9D6C1B #1B9D2B

square

#1B4C9D #9D1B8D #9D6C1B #1B9D2B

split-complementary

#1B4C9D #9D2B1B #8D9D1B

monochromatic

#091935 #123369 #1B4C9D #2465D1 #5187E1

Accessibility & contrast

On white

8.18

#1B4C9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1B4C9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4C9D

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4C9D	#FFFFFF	#000000	##FFFFFF
##1B4C9D	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1755A0

Deuteranopia (green-blind)

#004A9B

Tritanopia (blue-blind)

#00606D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b4c9d;
/* rgb */ color: rgb(27, 76, 157);
/* oklch */ color: oklch(43.3% 0.142 260.1);

Tailwind

colors: {
  custom: {
    50: '#6e7dba',
    500: '#1b4c9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4c9d;
$custom-light: #6e7dba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4c9d",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 157
  },
  "hsl": {
    "h": 217.385,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.4328,
    "c": 0.14228,
    "h": 260.1
  },
  "luminance": 0.07836
}

Semantic roles & 50–950 ramp

primary

#1B4C9D

secondary

#C49850

accent

#AA3AED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080912

muted

#7B7B81

Preview Lab

Preview with #1B4C9D

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

Preview Lab → · Contrast checker → · Palette generator →