#1F3373#1F3373

#1F3373 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.5% C 0.113 H 267.2°. Best body text is #FFFFFF at 11.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F3373
RGB	rgb(31, 51, 115)
HSL	hsl(226, 58%, 29%)
HSV	hsv(226, 73%, 45%)
CMYK	cmyk(73%, 55.7%, 0%, 54.9%)
CIE-LAB	lab(23.33, 15.85, -39.28)
CIE-LCH	lch(23.33, 42.36, 291.97°)
OKLab	oklab(34.48% -0.0056 -0.113)
OKLCH	oklch(34.48% 0.113 267.2)
XYZ	xyz(4.8423, 3.8963, 16.7132)
Luminance	0.0390 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3373 #735F1F

analogous

#1F5D73 #1F3373 #351F73

triadic

#1F3373 #731F33 #33731F

tetradic

#1F3373 #731F5D #735F1F #1F7335

square

#1F3373 #731F5D #735F1F #1F7335

split-complementary

#1F3373 #73351F #5D731F

monochromatic

#060B18 #121E43 #1F3373 #2C48A3 #4162CC

Accessibility & contrast

On white

11.80

#1F3373 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F3373 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3373

11.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3373	#FFFFFF	#000000	##FFFFFF
##1F3373	1.00	11.80	1.78	11.80
#FFFFFF	11.80	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#063C75

Deuteranopia (green-blind)

#003472

Tritanopia (blue-blind)

#00424D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3373;
/* rgb */ color: rgb(31, 51, 115);
/* oklch */ color: oklch(34.5% 0.113 267.2);

Tailwind

colors: {
  custom: {
    50: '#666a9c',
    500: '#1f3373',
    950: '#000000',
  },
}

SCSS

$custom: #1f3373;
$custom-light: #666a9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3373",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 115
  },
  "hsl": {
    "h": 225.714,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.34483,
    "c": 0.11311,
    "h": 267.2
  },
  "luminance": 0.03897
}

Semantic roles & 50–950 ramp

primary

#1F3373

secondary

#A79047

accent

#BC47E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3373

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

Preview Lab → · Contrast checker → · Palette generator →