#1F3699#1F3699

#1F3699 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.5% C 0.163 H 267.5°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#1F3699
RGB	rgb(31, 54, 153)
HSL	hsl(229, 66%, 36%)
HSV	hsv(229, 80%, 60%)
CMYK	cmyk(79.7%, 64.7%, 0%, 40%)
CIE-LAB	lab(27.38, 28.74, -56.41)
CIE-LCH	lch(27.38, 63.31, 297.00°)
OKLab	oklab(38.51% -0.007 -0.1632)
OKLCH	oklch(38.51% 0.163 267.5)
XYZ	xyz(7.6320, 5.2287, 30.7378)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3699 #99821F

analogous

#1F7399 #1F3699 #451F99

triadic

#1F3699 #991F36 #36991F

tetradic

#1F3699 #991F73 #99821F #1F9945

square

#1F3699 #991F73 #99821F #1F9945

split-complementary

#1F3699 #99451F #73991F

monochromatic

#0A1233 #152466 #1F3699 #2948CC #566FDD

Accessibility & contrast

On white

10.26

#1F3699 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1F3699 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3699

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3699	#FFFFFF	#000000	##FFFFFF
##1F3699	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00479C

Deuteranopia (green-blind)

#003B97

Tritanopia (blue-blind)

#005062

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3699;
/* rgb */ color: rgb(31, 54, 153);
/* oklch */ color: oklch(38.5% 0.163 267.5);

Tailwind

colors: {
  custom: {
    50: '#706cb8',
    500: '#1f3699',
    950: '#000000',
  },
}

SCSS

$custom: #1f3699;
$custom-light: #706cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3699",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 153
  },
  "hsl": {
    "h": 228.689,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38511,
    "c": 0.16338,
    "h": 267.5
  },
  "luminance": 0.0523
}

Semantic roles & 50–950 ramp

primary

#1F3699

secondary

#C0AC54

accent

#C93FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3699

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

Preview Lab → · Contrast checker → · Palette generator →