#1C47BB#1C47BB

#1C47BB is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.8% C 0.189 H 264.3°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#1C47BB
RGB	rgb(28, 71, 187)
HSL	hsl(224, 74%, 42%)
HSV	hsv(224, 85%, 73%)
CMYK	cmyk(85%, 62%, 0%, 26.7%)
CIE-LAB	lab(34.68, 30.26, -64.83)
CIE-LCH	lch(34.68, 71.55, 295.02°)
OKLab	oklab(44.82% -0.0187 -0.1877)
OKLCH	oklch(44.82% 0.189 264.3)
XYZ	xyz(11.6986, 8.3398, 47.9972)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C47BB #BB901C

analogous

#1C96BB #1C47BB #411CBB

triadic

#1C47BB #BB1C47 #47BB1C

tetradic

#1C47BB #BB1C96 #BB901C #1CBB41

square

#1C47BB #BB1C96 #BB901C #1CBB41

split-complementary

#1C47BB #BB411C #96BB1C

monochromatic

#0C1F51 #143386 #1C47BB #3462E1 #698BE9

Accessibility & contrast

On white

7.87

#1C47BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1C47BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C47BB

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C47BB	#FFFFFF	#000000	##FFFFFF
##1C47BB	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#00657A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1c47bb;
/* rgb */ color: rgb(28, 71, 187);
/* oklch */ color: oklch(44.8% 0.189 264.3);

Tailwind

colors: {
  custom: {
    50: '#7779d0',
    500: '#1c47bb',
    950: '#000000',
  },
}

SCSS

$custom: #1c47bb;
$custom-light: #7779d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c47bb",
  "rgb": {
    "r": 28,
    "g": 71,
    "b": 187
  },
  "hsl": {
    "h": 223.774,
    "s": 73.953,
    "l": 42.157
  },
  "oklch": {
    "l": 0.44821,
    "c": 0.18865,
    "h": 264.3
  },
  "luminance": 0.08341
}

Semantic roles & 50–950 ramp

primary

#1C47BB

secondary

#CEB265

accent

#BE37F1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0914

muted

#7C7B82

Preview Lab

Preview with #1C47BB

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

Preview Lab → · Contrast checker → · Palette generator →