#301F9B#301F9B

#301F9B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.1% C 0.186 H 277.8°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#301F9B
RGB	rgb(48, 31, 155)
HSL	hsl(248, 67%, 36%)
HSV	hsv(248, 80%, 61%)
CMYK	cmyk(69%, 80%, 0%, 39.2%)
CIE-LAB	lab(23.59, 45.00, -63.84)
CIE-LCH	lch(23.59, 78.11, 305.18°)
OKLab	oklab(36.12% 0.0252 -0.1844)
OKLCH	oklch(36.12% 0.186 277.8)
XYZ	xyz(7.6234, 3.9742, 31.3693)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#301F9B #8A9B1F

analogous

#1F4C9B #301F9B #6E1F9B

triadic

#301F9B #9B301F #1F9B30

tetradic

#301F9B #9B1F4C #8A9B1F #1F9B6E

square

#301F9B #9B1F4C #8A9B1F #1F9B6E

split-complementary

#301F9B #9B6E1F #4C9B1F

monochromatic

#100B35 #201568 #301F9B #4029CE #6957DD

Accessibility & contrast

On white

11.70

#301F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#301F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #301F9B

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##301F9B	#FFFFFF	#000000	##FFFFFF
##301F9B	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9E

Deuteranopia (green-blind)

#003399

Tritanopia (blue-blind)

#00455D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #301f9b;
/* rgb */ color: rgb(48, 31, 155);
/* oklch */ color: oklch(36.1% 0.186 277.8);

Tailwind

colors: {
  custom: {
    50: '#795eba',
    500: '#301f9b',
    950: '#000000',
  },
}

SCSS

$custom: #301f9b;
$custom-light: #795eba;
$custom-dark: #000000;

JSON

{
  "hex": "#301f9b",
  "rgb": {
    "r": 48,
    "g": 31,
    "b": 155
  },
  "hsl": {
    "h": 248.226,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.36122,
    "c": 0.18616,
    "h": 277.8
  },
  "luminance": 0.03975
}

Semantic roles & 50–950 ramp

primary

#301F9B

secondary

#B2C155

accent

#EA3ED2

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #301F9B

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

Preview Lab → · Contrast checker → · Palette generator →