#1B47AD#1B47AD

#1B47AD is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.5% C 0.170 H 263.4°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B47AD
RGB	rgb(27, 71, 173)
HSL	hsl(222, 73%, 39%)
HSV	hsv(222, 84%, 68%)
CMYK	cmyk(84.4%, 59%, 0%, 32.2%)
CIE-LAB	lab(33.47, 24.73, -58.53)
CIE-LCH	lch(33.47, 63.54, 292.91°)
OKLab	oklab(43.54% -0.0197 -0.1693)
OKLCH	oklch(43.54% 0.17 263.4)
XYZ	xyz(10.2454, 7.7554, 40.4840)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B47AD #AD811B

analogous

#1B90AD #1B47AD #381BAD

triadic

#1B47AD #AD1B47 #47AD1B

tetradic

#1B47AD #AD1B90 #AD811B #1BAD38

square

#1B47AD #AD1B90 #AD811B #1BAD38

split-complementary

#1B47AD #AD381B #90AD1B

monochromatic

#0A1C43 #133178 #1B47AD #285FDD #5D86E6

Accessibility & contrast

On white

8.23

#1B47AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1B47AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B47AD

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B47AD	#FFFFFF	#000000	##FFFFFF
##1B47AD	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B0

Deuteranopia (green-blind)

#0048AB

Tritanopia (blue-blind)

#006173

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b47ad;
/* rgb */ color: rgb(27, 71, 173);
/* oklch */ color: oklch(43.5% 0.170 263.4);

Tailwind

colors: {
  custom: {
    50: '#7379c6',
    500: '#1b47ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b47ad;
$custom-light: #7379c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b47ad",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 173
  },
  "hsl": {
    "h": 221.918,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.43541,
    "c": 0.17039,
    "h": 263.4
  },
  "luminance": 0.07757
}

Semantic roles & 50–950 ramp

primary

#1B47AD

secondary

#CAA85A

accent

#B838F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1B47AD

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

Preview Lab → · Contrast checker → · Palette generator →