#1C3F73#1C3F73

#1C3F73 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.098 H 258.3°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F73
RGB	rgb(28, 63, 115)
HSL	hsl(216, 61%, 28%)
HSV	hsv(216, 76%, 45%)
CMYK	cmyk(75.7%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(26.85, 6.94, -33.63)
CIE-LCH	lch(26.85, 34.33, 281.66°)
OKLab	oklab(37.14% -0.0199 -0.0962)
OKLCH	oklch(37.14% 0.098 258.3)
XYZ	xyz(5.3498, 5.0391, 16.9070)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F73 #73501C

analogous

#1C6A73 #1C3F73 #241C73

triadic

#1C3F73 #731C3F #3F731C

tetradic

#1C3F73 #731C6A #73501C #1C7324

square

#1C3F73 #731C6A #73501C #1C7324

split-complementary

#1C3F73 #73241C #6A731C

monochromatic

#060D19 #102442 #1C3F73 #285AA4 #3A76CF

Accessibility & contrast

On white

10.46

#1C3F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1C3F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F73

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F73	#FFFFFF	#000000	##FFFFFF
##1C3F73	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264475

Deuteranopia (green-blind)

#163C72

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c3f73;
/* rgb */ color: rgb(28, 63, 115);
/* oklch */ color: oklch(37.1% 0.098 258.3);

Tailwind

colors: {
  custom: {
    50: '#65739c',
    500: '#1c3f73',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f73;
$custom-light: #65739c;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f73",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 215.862,
    "s": 60.839,
    "l": 28.039
  },
  "oklch": {
    "l": 0.37138,
    "c": 0.0982,
    "h": 258.3
  },
  "luminance": 0.0504
}

Semantic roles & 50–950 ramp

primary

#1C3F73

secondary

#A77F43

accent

#A444E4

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1C3F73

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

Preview Lab → · Contrast checker → · Palette generator →