#1C40AF#1C40AF

#1C40AF is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.181 H 265.2°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#1C40AF
RGB	rgb(28, 64, 175)
HSL	hsl(225, 72%, 40%)
HSV	hsv(225, 84%, 69%)
CMYK	cmyk(84%, 63.4%, 0%, 31.4%)
CIE-LAB	lab(31.82, 30.28, -62.40)
CIE-LCH	lch(31.82, 69.36, 295.88°)
OKLab	oklab(42.38% -0.0152 -0.1807)
OKLCH	oklch(42.38% 0.181 265.2)
XYZ	xyz(10.0474, 7.0076, 41.3722)
Luminance	0.0701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C40AF #AF8B1C

analogous

#1C8AAF #1C40AF #411CAF

triadic

#1C40AF #AF1C40 #40AF1C

tetradic

#1C40AF #AF1C8A #AF8B1C #1CAF41

square

#1C40AF #AF1C8A #AF8B1C #1CAF41

split-complementary

#1C40AF #AF411C #8AAF1C

monochromatic

#0B1945 #142D7A #1C40AF #2B57DD #6081E6

Accessibility & contrast

On white

8.74

#1C40AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#1C40AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C40AF

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C40AF	#FFFFFF	#000000	##FFFFFF
##1C40AF	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B3

Deuteranopia (green-blind)

#0044AD

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1c40af;
/* rgb */ color: rgb(28, 64, 175);
/* oklch */ color: oklch(42.4% 0.181 265.2);

Tailwind

colors: {
  custom: {
    50: '#7474c8',
    500: '#1c40af',
    950: '#000000',
  },
}

SCSS

$custom: #1c40af;
$custom-light: #7474c8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c40af",
  "rgb": {
    "r": 28,
    "g": 64,
    "b": 175
  },
  "hsl": {
    "h": 225.306,
    "s": 72.414,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42377,
    "c": 0.18133,
    "h": 265.2
  },
  "luminance": 0.07009
}

Semantic roles & 50–950 ramp

primary

#1C40AF

secondary

#CAAF5D

accent

#C239EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C40AF

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

Preview Lab → · Contrast checker → · Palette generator →