#1F3166#1F3166

#1F3166 is a dark, moderate blue. Relative luminance 0.034; OKLCH L 33.0% C 0.096 H 267.0°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1F3166
RGB	rgb(31, 49, 102)
HSL	hsl(225, 53%, 26%)
HSV	hsv(225, 70%, 40%)
CMYK	cmyk(69.6%, 52%, 0%, 60%)
CIE-LAB	lab(21.75, 12.07, -33.44)
CIE-LCH	lch(21.75, 35.55, 289.85°)
OKLab	oklab(32.98% -0.0051 -0.0958)
OKLCH	oklch(32.98% 0.096 267)
XYZ	xyz(4.0608, 3.4469, 13.0191)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3166 #66541F

analogous

#1F5466 #1F3166 #301F66

triadic

#1F3166 #661F31 #31661F

tetradic

#1F3166 #661F54 #66541F #1F6630

square

#1F3166 #661F54 #66541F #1F6630

split-complementary

#1F3166 #66301F #54661F

monochromatic

#070B17 #111A37 #1F3166 #2D4895 #3C5EC4

Accessibility & contrast

On white

12.43

#1F3166 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1F3166 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3166

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3166	#FFFFFF	#000000	##FFFFFF
##1F3166	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#143868

Deuteranopia (green-blind)

#043165

Tritanopia (blue-blind)

#003D46

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f3166;
/* rgb */ color: rgb(31, 49, 102);
/* oklch */ color: oklch(33.0% 0.096 267.0);

Tailwind

colors: {
  custom: {
    50: '#646892',
    500: '#1f3166',
    950: '#000000',
  },
}

SCSS

$custom: #1f3166;
$custom-light: #646892;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3166",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 102
  },
  "hsl": {
    "h": 224.789,
    "s": 53.383,
    "l": 26.078
  },
  "oklch": {
    "l": 0.32978,
    "c": 0.09596,
    "h": 267
  },
  "luminance": 0.03447
}

Semantic roles & 50–950 ramp

primary

#1F3166

secondary

#9A8546

accent

#B84BDD

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F3166

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

Preview Lab → · Contrast checker → · Palette generator →