#301F99#301F99

#301F99 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.9% C 0.184 H 278.1°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#301F99
RGB	rgb(48, 31, 153)
HSL	hsl(248, 66%, 36%)
HSV	hsv(248, 80%, 60%)
CMYK	cmyk(68.6%, 79.7%, 0%, 40%)
CIE-LAB	lab(23.36, 44.38, -62.98)
CIE-LCH	lch(23.36, 77.04, 305.17°)
OKLab	oklab(35.9% 0.0257 -0.1819)
OKLCH	oklch(35.9% 0.184 278.1)
XYZ	xyz(7.4568, 3.9076, 30.4921)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#301F99 #88991F

analogous

#1F4B99 #301F99 #6D1F99

triadic

#301F99 #99301F #1F9930

tetradic

#301F99 #991F4B #88991F #1F996D

square

#301F99 #991F4B #88991F #1F996D

split-complementary

#301F99 #996D1F #4B991F

monochromatic

#100A33 #201566 #301F99 #4029CC #6956DD

Accessibility & contrast

On white

11.79

#301F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#301F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #301F99

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##301F99	#FFFFFF	#000000	##FFFFFF
##301F99	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9C

Deuteranopia (green-blind)

#003397

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #301f99;
/* rgb */ color: rgb(48, 31, 153);
/* oklch */ color: oklch(35.9% 0.184 278.1);

Tailwind

colors: {
  custom: {
    50: '#785eb8',
    500: '#301f99',
    950: '#000000',
  },
}

SCSS

$custom: #301f99;
$custom-light: #785eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#301f99",
  "rgb": {
    "r": 48,
    "g": 31,
    "b": 153
  },
  "hsl": {
    "h": 248.361,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.35901,
    "c": 0.18375,
    "h": 278.1
  },
  "luminance": 0.03908
}

Semantic roles & 50–950 ramp

primary

#301F99

secondary

#B1C054

accent

#E93FD1

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #301F99

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

Preview Lab → · Contrast checker → · Palette generator →