#1C3579#1C3579

#1C3579 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.3% C 0.120 H 265.4°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#1C3579
RGB	rgb(28, 53, 121)
HSL	hsl(224, 62%, 29%)
HSV	hsv(224, 77%, 47%)
CMYK	cmyk(76.9%, 56.2%, 0%, 52.5%)
CIE-LAB	lab(24.24, 16.41, -41.63)
CIE-LCH	lch(24.24, 44.75, 291.51°)
OKLab	oklab(35.28% -0.0097 -0.1199)
OKLCH	oklch(35.28% 0.12 265.4)
XYZ	xyz(5.2020, 4.1730, 18.6168)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3579 #79601C

analogous

#1C6479 #1C3579 #321C79

triadic

#1C3579 #791C35 #35791C

tetradic

#1C3579 #791C64 #79601C #1C7932

square

#1C3579 #791C64 #79601C #1C7932

split-complementary

#1C3579 #79321C #64791C

monochromatic

#060B19 #101F47 #1C3579 #284BAB #3D65D2

Accessibility & contrast

On white

11.45

#1C3579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1C3579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3579

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3579	#FFFFFF	#000000	##FFFFFF
##1C3579	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7B

Deuteranopia (green-blind)

#003678

Tritanopia (blue-blind)

#004651

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1c3579;
/* rgb */ color: rgb(28, 53, 121);
/* oklch */ color: oklch(35.3% 0.120 265.4);

Tailwind

colors: {
  custom: {
    50: '#676ba0',
    500: '#1c3579',
    950: '#000000',
  },
}

SCSS

$custom: #1c3579;
$custom-light: #676ba0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3579",
  "rgb": {
    "r": 28,
    "g": 53,
    "b": 121
  },
  "hsl": {
    "h": 223.871,
    "s": 62.416,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35279,
    "c": 0.12031,
    "h": 265.4
  },
  "luminance": 0.04174
}

Semantic roles & 50–950 ramp

primary

#1C3579

secondary

#AD9144

accent

#BA42E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060F

muted

#7A7A7E

Preview Lab

Preview with #1C3579

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

Preview Lab → · Contrast checker → · Palette generator →