#1B47B4#1B47B4

#1B47B4 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.2% C 0.180 H 263.8°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B47B4
RGB	rgb(27, 71, 180)
HSL	hsl(223, 74%, 41%)
HSV	hsv(223, 85%, 71%)
CMYK	cmyk(85%, 60.6%, 0%, 29.4%)
CIE-LAB	lab(34.05, 27.48, -61.73)
CIE-LCH	lch(34.05, 67.57, 294.00°)
OKLab	oklab(44.16% -0.0194 -0.1786)
OKLCH	oklch(44.16% 0.18 263.8)
XYZ	xyz(10.9405, 8.0334, 44.1451)
Luminance	0.0804 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B47B4 #B4881B

analogous

#1B93B4 #1B47B4 #3B1BB4

triadic

#1B47B4 #B41B47 #47B41B

tetradic

#1B47B4 #B41B93 #B4881B #1BB43B

square

#1B47B4 #B41B93 #B4881B #1BB43B

split-complementary

#1B47B4 #B43B1B #93B41B

monochromatic

#0B1D4A #13327F #1B47B4 #2D60DF #6288E7

Accessibility & contrast

On white

8.06

#1B47B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1B47B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B47B4

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B47B4	#FFFFFF	#000000	##FFFFFF
##1B47B4	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B8

Deuteranopia (green-blind)

#0049B2

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b47b4;
/* rgb */ color: rgb(27, 71, 180);
/* oklch */ color: oklch(44.2% 0.180 263.8);

Tailwind

colors: {
  custom: {
    50: '#7579cb',
    500: '#1b47b4',
    950: '#000000',
  },
}

SCSS

$custom: #1b47b4;
$custom-light: #7579cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b47b4",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 180
  },
  "hsl": {
    "h": 222.745,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.4416,
    "c": 0.17969,
    "h": 263.8
  },
  "luminance": 0.08035
}

Semantic roles & 50–950 ramp

primary

#1B47B4

secondary

#CCAD5F

accent

#BB37F1

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1B47B4

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

Preview Lab → · Contrast checker → · Palette generator →