#1F3669#1F3669

#1F3669 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.4% C 0.094 H 263.9°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F3669
RGB	rgb(31, 54, 105)
HSL	hsl(221, 54%, 27%)
HSV	hsv(221, 70%, 41%)
CMYK	cmyk(70.5%, 48.6%, 0%, 58.8%)
CIE-LAB	lab(23.50, 9.71, -32.57)
CIE-LCH	lch(23.50, 33.99, 286.60°)
OKLab	oklab(34.38% -0.01 -0.0932)
OKLCH	oklch(34.38% 0.094 263.9)
XYZ	xyz(4.4331, 3.9491, 13.8905)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3669 #69521F

analogous

#1F5B69 #1F3669 #2D1F69

triadic

#1F3669 #691F36 #36691F

tetradic

#1F3669 #691F5B #69521F #1F692D

square

#1F3669 #691F5B #69521F #1F692D

split-complementary

#1F3669 #692D1F #5B691F

monochromatic

#070C18 #111E3A #1F3669 #2D4E98 #3D67C6

Accessibility & contrast

On white

11.73

#1F3669 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F3669 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3669

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3669	#FFFFFF	#000000	##FFFFFF
##1F3669	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D3C6B

Deuteranopia (green-blind)

#0E3568

Tritanopia (blue-blind)

#00424A

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3669;
/* rgb */ color: rgb(31, 54, 105);
/* oklch */ color: oklch(34.4% 0.094 263.9);

Tailwind

colors: {
  custom: {
    50: '#646c94',
    500: '#1f3669',
    950: '#000000',
  },
}

SCSS

$custom: #1f3669;
$custom-light: #646c94;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3669",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 105
  },
  "hsl": {
    "h": 221.351,
    "s": 54.412,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34384,
    "c": 0.09371,
    "h": 263.9
  },
  "luminance": 0.0395
}

Semantic roles & 50–950 ramp

primary

#1F3669

secondary

#9D8247

accent

#B04ADE

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F3669

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

Preview Lab → · Contrast checker → · Palette generator →