#1F3370#1F3370

#1F3370 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.2% C 0.109 H 266.9°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F3370
RGB	rgb(31, 51, 112)
HSL	hsl(225, 57%, 28%)
HSV	hsv(225, 72%, 44%)
CMYK	cmyk(72.3%, 54.5%, 0%, 56.1%)
CIE-LAB	lab(23.10, 14.65, -37.73)
CIE-LCH	lch(23.10, 40.48, 291.22°)
OKLab	oklab(34.24% -0.0059 -0.1084)
OKLCH	oklch(34.24% 0.109 266.9)
XYZ	xyz(4.6725, 3.8283, 15.8188)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3370 #705C1F

analogous

#1F5B70 #1F3370 #331F70

triadic

#1F3370 #701F33 #33701F

tetradic

#1F3370 #701F5B #705C1F #1F7033

square

#1F3370 #701F5B #705C1F #1F7033

split-complementary

#1F3370 #70331F #5B701F

monochromatic

#070B18 #121D40 #1F3370 #2C49A0 #3F62CA

Accessibility & contrast

On white

11.89

#1F3370 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F3370 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3370

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3370	#FFFFFF	#000000	##FFFFFF
##1F3370	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3B72

Deuteranopia (green-blind)

#00346F

Tritanopia (blue-blind)

#00414C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f3370;
/* rgb */ color: rgb(31, 51, 112);
/* oklch */ color: oklch(34.2% 0.109 266.9);

Tailwind

colors: {
  custom: {
    50: '#666a99',
    500: '#1f3370',
    950: '#000000',
  },
}

SCSS

$custom: #1f3370;
$custom-light: #666a99;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3370",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 112
  },
  "hsl": {
    "h": 225.185,
    "s": 56.643,
    "l": 28.039
  },
  "oklch": {
    "l": 0.34236,
    "c": 0.10858,
    "h": 266.9
  },
  "luminance": 0.03829
}

Semantic roles & 50–950 ramp

primary

#1F3370

secondary

#A48D47

accent

#BA48E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F3370

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

Preview Lab → · Contrast checker → · Palette generator →