#1F3D73#1F3D73

#1F3D73 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.100 H 261.1°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D73
RGB	rgb(31, 61, 115)
HSL	hsl(219, 58%, 29%)
HSV	hsv(219, 73%, 45%)
CMYK	cmyk(73%, 47%, 0%, 54.9%)
CIE-LAB	lab(26.35, 8.81, -34.41)
CIE-LCH	lch(26.35, 35.52, 284.35°)
OKLab	oklab(36.79% -0.0154 -0.0985)
OKLCH	oklch(36.79% 0.1 261.1)
XYZ	xyz(5.3272, 4.8660, 16.8748)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D73 #73551F

analogous

#1F6773 #1F3D73 #2B1F73

triadic

#1F3D73 #731F3D #3D731F

tetradic

#1F3D73 #731F67 #73551F #1F732B

square

#1F3D73 #731F67 #73551F #1F732B

split-complementary

#1F3D73 #732B1F #67731F

monochromatic

#060D18 #122343 #1F3D73 #2C57A3 #4172CC

Accessibility & contrast

On white

10.64

#1F3D73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3D73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D73

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D73	#FFFFFF	#000000	##FFFFFF
##1F3D73	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224275

Deuteranopia (green-blind)

#123B72

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3d73;
/* rgb */ color: rgb(31, 61, 115);
/* oklch */ color: oklch(36.8% 0.100 261.1);

Tailwind

colors: {
  custom: {
    50: '#66729c',
    500: '#1f3d73',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d73;
$custom-light: #66729c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d73",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 115
  },
  "hsl": {
    "h": 218.571,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.36791,
    "c": 0.09967,
    "h": 261.1
  },
  "luminance": 0.04867
}

Semantic roles & 50–950 ramp

primary

#1F3D73

secondary

#A78547

accent

#AA47E1

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1F3D73

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

Preview Lab → · Contrast checker → · Palette generator →