#1C3573#1C3573

#1C3573 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.8% C 0.111 H 264.7°. Best body text is #FFFFFF at 11.63:1 contrast (WCAG AA passes).

Color values

HEX	#1C3573
RGB	rgb(28, 53, 115)
HSL	hsl(223, 61%, 28%)
HSV	hsv(223, 76%, 45%)
CMYK	cmyk(75.7%, 53.9%, 0%, 54.9%)
CIE-LAB	lab(23.77, 13.97, -38.57)
CIE-LCH	lch(23.77, 41.02, 289.91°)
OKLab	oklab(34.78% -0.0103 -0.1109)
OKLCH	oklch(34.78% 0.111 264.7)
XYZ	xyz(4.8454, 4.0304, 16.7389)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3573 #735A1C

analogous

#1C6073 #1C3573 #2F1C73

triadic

#1C3573 #731C35 #35731C

tetradic

#1C3573 #731C60 #735A1C #1C732F

square

#1C3573 #731C60 #735A1C #1C732F

split-complementary

#1C3573 #732F1C #60731C

monochromatic

#060B19 #101E42 #1C3573 #284CA4 #3A65CF

Accessibility & contrast

On white

11.63

#1C3573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1C3573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3573

11.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3573	#FFFFFF	#000000	##FFFFFF
##1C3573	1.00	11.63	1.81	11.63
#FFFFFF	11.63	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D3D75

Deuteranopia (green-blind)

#003572

Tritanopia (blue-blind)

#00444E

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1c3573;
/* rgb */ color: rgb(28, 53, 115);
/* oklch */ color: oklch(34.8% 0.111 264.7);

Tailwind

colors: {
  custom: {
    50: '#656b9c',
    500: '#1c3573',
    950: '#000000',
  },
}

SCSS

$custom: #1c3573;
$custom-light: #656b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3573",
  "rgb": {
    "r": 28,
    "g": 53,
    "b": 115
  },
  "hsl": {
    "h": 222.759,
    "s": 60.839,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3478,
    "c": 0.11138,
    "h": 264.7
  },
  "luminance": 0.04031
}

Semantic roles & 50–950 ramp

primary

#1C3573

secondary

#A78B43

accent

#B644E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1C3573

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

Preview Lab → · Contrast checker → · Palette generator →