#1B47BB#1B47BB

#1B47BB is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.8% C 0.189 H 264.1°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B47BB
RGB	rgb(27, 71, 187)
HSL	hsl(224, 75%, 42%)
HSV	hsv(224, 86%, 73%)
CMYK	cmyk(85.6%, 62%, 0%, 26.7%)
CIE-LAB	lab(34.65, 30.19, -64.88)
CIE-LCH	lch(34.65, 71.56, 294.96°)
OKLab	oklab(44.79% -0.0193 -0.1879)
OKLCH	oklch(44.79% 0.189 264.1)
XYZ	xyz(11.6717, 8.3259, 47.9960)
Luminance	0.0833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B47BB #BB8F1B

analogous

#1B97BB #1B47BB #3F1BBB

triadic

#1B47BB #BB1B47 #47BB1B

tetradic

#1B47BB #BB1B97 #BB8F1B #1BBB3F

square

#1B47BB #BB1B97 #BB8F1B #1BBB3F

split-complementary

#1B47BB #BB3F1B #97BB1B

monochromatic

#0C1E50 #133386 #1B47BB #3262E1 #678BE9

Accessibility & contrast

On white

7.88

#1B47BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1B47BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B47BB

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B47BB	#FFFFFF	#000000	##FFFFFF
##1B47BB	1.00	7.88	2.67	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#00657A

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b47bb;
/* rgb */ color: rgb(27, 71, 187);
/* oklch */ color: oklch(44.8% 0.189 264.1);

Tailwind

colors: {
  custom: {
    50: '#7779d0',
    500: '#1b47bb',
    950: '#000000',
  },
}

SCSS

$custom: #1b47bb;
$custom-light: #7779d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b47bb",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 187
  },
  "hsl": {
    "h": 223.5,
    "s": 74.766,
    "l": 41.961
  },
  "oklch": {
    "l": 0.44792,
    "c": 0.18886,
    "h": 264.1
  },
  "luminance": 0.08327
}

Semantic roles & 50–950 ramp

primary

#1B47BB

secondary

#CEB163

accent

#BE36F1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0914

muted

#7C7B82

Preview Lab

Preview with #1B47BB

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

Preview Lab → · Contrast checker → · Palette generator →