#1B4C99#1B4C99

#1B4C99 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.0% C 0.137 H 259.4°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B4C99
RGB	rgb(27, 76, 153)
HSL	hsl(217, 70%, 35%)
HSV	hsv(217, 82%, 60%)
CMYK	cmyk(82.4%, 50.3%, 0%, 40%)
CIE-LAB	lab(33.35, 13.34, -46.70)
CIE-LCH	lch(33.35, 48.57, 285.94°)
OKLab	oklab(42.97% -0.0251 -0.1344)
OKLCH	oklch(42.97% 0.137 259.4)
XYZ	xyz(8.7841, 7.7007, 31.1542)
Luminance	0.0770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4C99 #99681B

analogous

#1B8B99 #1B4C99 #291B99

triadic

#1B4C99 #991B4C #4C991B

tetradic

#1B4C99 #991B8B #99681B #1B9929

square

#1B4C99 #991B8B #99681B #1B9929

split-complementary

#1B4C99 #99291B #8B991B

monochromatic

#091831 #123265 #1B4C99 #2466CD #4F87E0

Accessibility & contrast

On white

8.27

#1B4C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1B4C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4C99

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4C99	#FFFFFF	#000000	##FFFFFF
##1B4C99	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)

#1D549C

Deuteranopia (green-blind)

#004997

Tritanopia (blue-blind)

#005F6B

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4c99;
/* rgb */ color: rgb(27, 76, 153);
/* oklch */ color: oklch(43.0% 0.137 259.4);

Tailwind

colors: {
  custom: {
    50: '#6d7db8',
    500: '#1b4c99',
    950: '#000000',
  },
}

SCSS

$custom: #1b4c99;
$custom-light: #6d7db8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4c99",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 153
  },
  "hsl": {
    "h": 216.667,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.42971,
    "c": 0.13671,
    "h": 259.4
  },
  "luminance": 0.07702
}

Semantic roles & 50–950 ramp

primary

#1B4C99

secondary

#C2954E

accent

#A83BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4C99

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

Preview Lab → · Contrast checker → · Palette generator →