#1F3769#1F3769

#1F3769 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.092 H 263.1°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F3769
RGB	rgb(31, 55, 105)
HSL	hsl(221, 54%, 27%)
HSV	hsv(221, 70%, 41%)
CMYK	cmyk(70.5%, 47.6%, 0%, 58.8%)
CIE-LAB	lab(23.81, 9.01, -32.07)
CIE-LCH	lch(23.81, 33.31, 285.68°)
OKLab	oklab(34.62% -0.011 -0.0917)
OKLCH	oklch(34.62% 0.092 263.1)
XYZ	xyz(4.4802, 4.0432, 13.9062)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3769 #69511F

analogous

#1F5C69 #1F3769 #2C1F69

triadic

#1F3769 #691F37 #37691F

tetradic

#1F3769 #691F5C #69511F #1F692C

square

#1F3769 #691F5C #69511F #1F692C

split-complementary

#1F3769 #692C1F #5C691F

monochromatic

#070C18 #111E3A #1F3769 #2D5098 #3D69C6

Accessibility & contrast

On white

11.61

#1F3769 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1F3769 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3769

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3769	#FFFFFF	#000000	##FFFFFF
##1F3769	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3C6B

Deuteranopia (green-blind)

#113568

Tritanopia (blue-blind)

#00434A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f3769;
/* rgb */ color: rgb(31, 55, 105);
/* oklch */ color: oklch(34.6% 0.092 263.1);

Tailwind

colors: {
  custom: {
    50: '#646d94',
    500: '#1f3769',
    950: '#000000',
  },
}

SCSS

$custom: #1f3769;
$custom-light: #646d94;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3769",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 105
  },
  "hsl": {
    "h": 220.541,
    "s": 54.412,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34623,
    "c": 0.09236,
    "h": 263.1
  },
  "luminance": 0.04044
}

Semantic roles & 50–950 ramp

primary

#1F3769

secondary

#9D8147

accent

#AE4ADE

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1F3769

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

Preview Lab → · Contrast checker → · Palette generator →