#1C3873#1C3873

#1C3873 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.5% C 0.107 H 263.0°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#1C3873
RGB	rgb(28, 56, 115)
HSL	hsl(221, 61%, 28%)
HSV	hsv(221, 76%, 45%)
CMYK	cmyk(75.7%, 51.3%, 0%, 54.9%)
CIE-LAB	lab(24.68, 11.84, -37.10)
CIE-LCH	lch(24.68, 38.95, 287.70°)
OKLab	oklab(35.47% -0.0131 -0.1065)
OKLCH	oklch(35.47% 0.107 263)
XYZ	xyz(4.9865, 4.3125, 16.7859)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3873 #73571C

analogous

#1C6373 #1C3873 #2C1C73

triadic

#1C3873 #731C38 #38731C

tetradic

#1C3873 #731C63 #73571C #1C732C

square

#1C3873 #731C63 #73571C #1C732C

split-complementary

#1C3873 #732C1C #63731C

monochromatic

#060C19 #102042 #1C3873 #2850A4 #3A6ACF

Accessibility & contrast

On white

11.27

#1C3873 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1C3873 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3873

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3873	#FFFFFF	#000000	##FFFFFF
##1C3873	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163F75

Deuteranopia (green-blind)

#003772

Tritanopia (blue-blind)

#004650

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1c3873;
/* rgb */ color: rgb(28, 56, 115);
/* oklch */ color: oklch(35.5% 0.107 263.0);

Tailwind

colors: {
  custom: {
    50: '#656e9c',
    500: '#1c3873',
    950: '#000000',
  },
}

SCSS

$custom: #1c3873;
$custom-light: #656e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3873",
  "rgb": {
    "r": 28,
    "g": 56,
    "b": 115
  },
  "hsl": {
    "h": 220.69,
    "s": 60.839,
    "l": 28.039
  },
  "oklch": {
    "l": 0.35471,
    "c": 0.10734,
    "h": 263
  },
  "luminance": 0.04313
}

Semantic roles & 50–950 ramp

primary

#1C3873

secondary

#A78743

accent

#B044E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1C3873

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

Preview Lab → · Contrast checker → · Palette generator →