#1C3580#1C3580

#1C3580 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.131 H 266.0°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1C3580
RGB	rgb(28, 53, 128)
HSL	hsl(225, 64%, 31%)
HSV	hsv(225, 78%, 50%)
CMYK	cmyk(78.1%, 58.6%, 0%, 49.8%)
CIE-LAB	lab(24.80, 19.24, -45.14)
CIE-LCH	lch(24.80, 49.07, 293.09°)
OKLab	oklab(35.88% -0.0092 -0.1302)
OKLCH	oklch(35.88% 0.131 266)
XYZ	xyz(5.6469, 4.3510, 20.9601)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3580 #80671C

analogous

#1C6780 #1C3580 #351C80

triadic

#1C3580 #801C35 #35801C

tetradic

#1C3580 #801C67 #80671C #1C8035

square

#1C3580 #801C67 #80671C #1C8035

split-complementary

#1C3580 #80351C #67801C

monochromatic

#060B1C #11204E #1C3580 #274AB2 #4166D5

Accessibility & contrast

On white

11.23

#1C3580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1C3580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3580

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3580	#FFFFFF	#000000	##FFFFFF
##1C3580	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004083

Deuteranopia (green-blind)

#00367F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1c3580;
/* rgb */ color: rgb(28, 53, 128);
/* oklch */ color: oklch(35.9% 0.131 266.0);

Tailwind

colors: {
  custom: {
    50: '#696ba5',
    500: '#1c3580',
    950: '#000000',
  },
}

SCSS

$custom: #1c3580;
$custom-light: #696ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3580",
  "rgb": {
    "r": 28,
    "g": 53,
    "b": 128
  },
  "hsl": {
    "h": 225,
    "s": 64.103,
    "l": 30.588
  },
  "oklch": {
    "l": 0.35881,
    "c": 0.13055,
    "h": 266
  },
  "luminance": 0.04352
}

Semantic roles & 50–950 ramp

primary

#1C3580

secondary

#B39844

accent

#BE41E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1C3580

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

Preview Lab → · Contrast checker → · Palette generator →