#1B47A8#1B47A8

#1B47A8 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.1% C 0.164 H 263.0°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#1B47A8
RGB	rgb(27, 71, 168)
HSL	hsl(221, 72%, 38%)
HSV	hsv(221, 84%, 66%)
CMYK	cmyk(83.9%, 57.7%, 0%, 34.1%)
CIE-LAB	lab(33.06, 22.75, -56.20)
CIE-LCH	lch(33.06, 60.63, 292.04°)
OKLab	oklab(43.11% -0.02 -0.1624)
OKLCH	oklch(43.11% 0.164 263)
XYZ	xyz(9.7706, 7.5654, 37.9835)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B47A8 #A87C1B

analogous

#1B8DA8 #1B47A8 #361BA8

triadic

#1B47A8 #A81B47 #47A81B

tetradic

#1B47A8 #A81B8D #A87C1B #1BA836

square

#1B47A8 #A81B8D #A87C1B #1BA836

split-complementary

#1B47A8 #A8361B #8DA81B

monochromatic

#0A1A3F #133173 #1B47A8 #245EDC #5985E4

Accessibility & contrast

On white

8.36

#1B47A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B47A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B47A8

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B47A8	#FFFFFF	#000000	##FFFFFF
##1B47A8	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054AB

Deuteranopia (green-blind)

#0048A6

Tritanopia (blue-blind)

#005F70

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b47a8;
/* rgb */ color: rgb(27, 71, 168);
/* oklch */ color: oklch(43.1% 0.164 263.0);

Tailwind

colors: {
  custom: {
    50: '#7179c3',
    500: '#1b47a8',
    950: '#000000',
  },
}

SCSS

$custom: #1b47a8;
$custom-light: #7179c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b47a8",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 168
  },
  "hsl": {
    "h": 221.277,
    "s": 72.308,
    "l": 38.235
  },
  "oklch": {
    "l": 0.43108,
    "c": 0.16366,
    "h": 263
  },
  "luminance": 0.07567
}

Semantic roles & 50–950 ramp

primary

#1B47A8

secondary

#C8A557

accent

#B639EF

background

#F7F7FC

surface

#EDEDF8

border

#C8C8D1

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B47A8

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

Preview Lab → · Contrast checker → · Palette generator →