#1F3D99#1F3D99

#1F3D99 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.155 H 265.8°. Best body text is #FFFFFF at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D99
RGB	rgb(31, 61, 153)
HSL	hsl(225, 66%, 36%)
HSV	hsv(225, 80%, 60%)
CMYK	cmyk(79.7%, 60.1%, 0%, 40%)
CIE-LAB	lab(29.23, 24.00, -53.38)
CIE-LCH	lch(29.23, 58.53, 294.21°)
OKLab	oklab(39.89% -0.0114 -0.1543)
OKLCH	oklch(39.89% 0.155 265.8)
XYZ	xyz(7.9816, 5.9278, 30.8543)
Luminance	0.0593 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D99 #997B1F

analogous

#1F7A99 #1F3D99 #3E1F99

triadic

#1F3D99 #991F3D #3D991F

tetradic

#1F3D99 #991F7A #997B1F #1F993E

square

#1F3D99 #991F7A #997B1F #1F993E

split-complementary

#1F3D99 #993E1F #7A991F

monochromatic

#0A1433 #152966 #1F3D99 #2951CC #5677DD

Accessibility & contrast

On white

9.61

#1F3D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1F3D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D99

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D99	#FFFFFF	#000000	##FFFFFF
##1F3D99	1.00	9.61	2.19	9.61
#FFFFFF	9.61	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3d99;
/* rgb */ color: rgb(31, 61, 153);
/* oklch */ color: oklch(39.9% 0.155 265.8);

Tailwind

colors: {
  custom: {
    50: '#6f72b8',
    500: '#1f3d99',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d99;
$custom-light: #6f72b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d99",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 225.246,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39886,
    "c": 0.15468,
    "h": 265.8
  },
  "luminance": 0.05929
}

Semantic roles & 50–950 ramp

primary

#1F3D99

secondary

#C0A654

accent

#BF3FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3D99

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

Preview Lab → · Contrast checker → · Palette generator →