#1F3499#1F3499

#1F3499 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.1% C 0.166 H 268.0°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#1F3499
RGB	rgb(31, 52, 153)
HSL	hsl(230, 66%, 36%)
HSV	hsv(230, 80%, 60%)
CMYK	cmyk(79.7%, 66%, 0%, 40%)
CIE-LAB	lab(26.87, 30.08, -57.25)
CIE-LCH	lch(26.87, 64.67, 297.72°)
OKLab	oklab(38.14% -0.0058 -0.1657)
OKLCH	oklch(38.14% 0.166 268)
XYZ	xyz(7.5408, 5.0463, 30.7074)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3499 #99841F

analogous

#1F7199 #1F3499 #471F99

triadic

#1F3499 #991F34 #34991F

tetradic

#1F3499 #991F71 #99841F #1F9947

square

#1F3499 #991F71 #99841F #1F9947

split-complementary

#1F3499 #99471F #71991F

monochromatic

#0A1133 #152366 #1F3499 #2945CC #566DDD

Accessibility & contrast

On white

10.45

#1F3499 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F3499 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3499

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3499	#FFFFFF	#000000	##FFFFFF
##1F3499	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459C

Deuteranopia (green-blind)

#003A97

Tritanopia (blue-blind)

#004F61

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3499;
/* rgb */ color: rgb(31, 52, 153);
/* oklch */ color: oklch(38.1% 0.166 268.0);

Tailwind

colors: {
  custom: {
    50: '#706bb8',
    500: '#1f3499',
    950: '#000000',
  },
}

SCSS

$custom: #1f3499;
$custom-light: #706bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3499",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 153
  },
  "hsl": {
    "h": 229.672,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38135,
    "c": 0.16579,
    "h": 268
  },
  "luminance": 0.05047
}

Semantic roles & 50–950 ramp

primary

#1F3499

secondary

#C0AE54

accent

#CC3FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1F3499

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

Preview Lab → · Contrast checker → · Palette generator →