#1B48BB#1B48BB

#1B48BB is a dark, vivid blue. Relative luminance 0.085; OKLCH L 45.0% C 0.188 H 264.0°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#1B48BB
RGB	rgb(27, 72, 187)
HSL	hsl(223, 75%, 42%)
HSV	hsv(223, 86%, 73%)
CMYK	cmyk(85.6%, 61.5%, 0%, 26.7%)
CIE-LAB	lab(34.91, 29.53, -64.46)
CIE-LCH	lch(34.91, 70.90, 294.62°)
OKLab	oklab(44.99% -0.0198 -0.1866)
OKLCH	oklch(44.99% 0.188 264)
XYZ	xyz(11.7358, 8.4541, 48.0173)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B48BB #BB8E1B

analogous

#1B98BB #1B48BB #3E1BBB

triadic

#1B48BB #BB1B48 #48BB1B

tetradic

#1B48BB #BB1B98 #BB8E1B #1BBB3E

square

#1B48BB #BB1B98 #BB8E1B #1BBB3E

split-complementary

#1B48BB #BB3E1B #98BB1B

monochromatic

#0C1F50 #133386 #1B48BB #3263E1 #678CE9

Accessibility & contrast

On white

7.80

#1B48BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1B48BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B48BB

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B48BB	#FFFFFF	#000000	##FFFFFF
##1B48BB	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b48bb;
/* rgb */ color: rgb(27, 72, 187);
/* oklch */ color: oklch(45.0% 0.188 264.0);

Tailwind

colors: {
  custom: {
    50: '#767ad0',
    500: '#1b48bb',
    950: '#000000',
  },
}

SCSS

$custom: #1b48bb;
$custom-light: #767ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b48bb",
  "rgb": {
    "r": 27,
    "g": 72,
    "b": 187
  },
  "hsl": {
    "h": 223.125,
    "s": 74.766,
    "l": 41.961
  },
  "oklch": {
    "l": 0.44985,
    "c": 0.18766,
    "h": 264
  },
  "luminance": 0.08456
}

Semantic roles & 50–950 ramp

primary

#1B48BB

secondary

#CEB063

accent

#BD36F1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0914

muted

#7C7B82

Preview Lab

Preview with #1B48BB

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

Preview Lab → · Contrast checker → · Palette generator →