#1F3473#1F3473

#1F3473 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.7% C 0.112 H 266.6°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F3473
RGB	rgb(31, 52, 115)
HSL	hsl(225, 58%, 29%)
HSV	hsv(225, 73%, 45%)
CMYK	cmyk(73%, 54.8%, 0%, 54.9%)
CIE-LAB	lab(23.62, 15.14, -38.81)
CIE-LCH	lch(23.62, 41.65, 291.31°)
OKLab	oklab(34.71% -0.0066 -0.1115)
OKLCH	oklch(34.71% 0.112 266.6)
XYZ	xyz(4.8865, 3.9846, 16.7279)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3473 #735E1F

analogous

#1F5E73 #1F3473 #341F73

triadic

#1F3473 #731F34 #34731F

tetradic

#1F3473 #731F5E #735E1F #1F7334

square

#1F3473 #731F5E #735E1F #1F7334

split-complementary

#1F3473 #73341F #5E731F

monochromatic

#060B18 #121E43 #1F3473 #2C4AA3 #4163CC

Accessibility & contrast

On white

11.69

#1F3473 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F3473 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3473

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3473	#FFFFFF	#000000	##FFFFFF
##1F3473	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A3C75

Deuteranopia (green-blind)

#003572

Tritanopia (blue-blind)

#00434E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3473;
/* rgb */ color: rgb(31, 52, 115);
/* oklch */ color: oklch(34.7% 0.112 266.6);

Tailwind

colors: {
  custom: {
    50: '#666b9c',
    500: '#1f3473',
    950: '#000000',
  },
}

SCSS

$custom: #1f3473;
$custom-light: #666b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3473",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 115
  },
  "hsl": {
    "h": 225,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.34706,
    "c": 0.11174,
    "h": 266.6
  },
  "luminance": 0.03985
}

Semantic roles & 50–950 ramp

primary

#1F3473

secondary

#A78F47

accent

#BA47E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F3473

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

Preview Lab → · Contrast checker → · Palette generator →