#1F3299#1F3299

#1F3299 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.8% C 0.168 H 268.4°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3299
RGB	rgb(31, 50, 153)
HSL	hsl(231, 66%, 36%)
HSV	hsv(231, 80%, 60%)
CMYK	cmyk(79.7%, 67.3%, 0%, 40%)
CIE-LAB	lab(26.37, 31.40, -58.07)
CIE-LCH	lch(26.37, 66.02, 298.40°)
OKLab	oklab(37.77% -0.0047 -0.1681)
OKLCH	oklch(37.77% 0.168 268.4)
XYZ	xyz(7.4535, 4.8716, 30.6783)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3299 #99861F

analogous

#1F6F99 #1F3299 #491F99

triadic

#1F3299 #991F32 #32991F

tetradic

#1F3299 #991F6F #99861F #1F9949

square

#1F3299 #991F6F #99861F #1F9949

split-complementary

#1F3299 #99491F #6F991F

monochromatic

#0A1133 #152166 #1F3299 #2943CC #566BDD

Accessibility & contrast

On white

10.64

#1F3299 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3299 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3299

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3299	#FFFFFF	#000000	##FFFFFF
##1F3299	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449C

Deuteranopia (green-blind)

#003997

Tritanopia (blue-blind)

#004E61

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3299;
/* rgb */ color: rgb(31, 50, 153);
/* oklch */ color: oklch(37.8% 0.168 268.4);

Tailwind

colors: {
  custom: {
    50: '#706ab8',
    500: '#1f3299',
    950: '#000000',
  },
}

SCSS

$custom: #1f3299;
$custom-light: #706ab8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3299",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 153
  },
  "hsl": {
    "h": 230.656,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.37768,
    "c": 0.16818,
    "h": 268.4
  },
  "luminance": 0.04872
}

Semantic roles & 50–950 ramp

primary

#1F3299

secondary

#C0AF54

accent

#CF3FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1F3299

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

Preview Lab → · Contrast checker → · Palette generator →