#1B48BC#1B48BC

#1B48BC is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.1% C 0.189 H 264.0°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B48BC
RGB	rgb(27, 72, 188)
HSL	hsl(223, 75%, 42%)
HSV	hsv(223, 86%, 74%)
CMYK	cmyk(85.6%, 61.7%, 0%, 26.3%)
CIE-LAB	lab(35.00, 29.92, -64.90)
CIE-LCH	lch(35.00, 71.47, 294.75°)
OKLab	oklab(45.08% -0.0198 -0.1879)
OKLCH	oklch(45.08% 0.189 264)
XYZ	xyz(11.8432, 8.4971, 48.5831)
Luminance	0.0850 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B48BC #BC8F1B

analogous

#1B99BC #1B48BC #3F1BBC

triadic

#1B48BC #BC1B48 #48BC1B

tetradic

#1B48BC #BC1B99 #BC8F1B #1BBC3F

square

#1B48BC #BC1B99 #BC8F1B #1BBC3F

split-complementary

#1B48BC #BC3F1B #99BC1B

monochromatic

#0C1F51 #133486 #1B48BC #3363E2 #688CE9

Accessibility & contrast

On white

7.78

#1B48BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#1B48BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B48BC

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B48BC	#FFFFFF	#000000	##FFFFFF
##1B48BC	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC0

Deuteranopia (green-blind)

#004BBA

Tritanopia (blue-blind)

#00667B

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b48bc;
/* rgb */ color: rgb(27, 72, 188);
/* oklch */ color: oklch(45.1% 0.189 264.0);

Tailwind

colors: {
  custom: {
    50: '#777ad1',
    500: '#1b48bc',
    950: '#000000',
  },
}

SCSS

$custom: #1b48bc;
$custom-light: #777ad1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b48bc",
  "rgb": {
    "r": 27,
    "g": 72,
    "b": 188
  },
  "hsl": {
    "h": 223.23,
    "s": 74.884,
    "l": 42.157
  },
  "oklch": {
    "l": 0.45076,
    "c": 0.18896,
    "h": 264
  },
  "luminance": 0.08499
}

Semantic roles & 50–950 ramp

primary

#1B48BC

secondary

#CFB164

accent

#BD36F2

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0A0914

muted

#7C7B83

Preview Lab

Preview with #1B48BC

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

Preview Lab → · Contrast checker → · Palette generator →