#301F8B#301F8B

#301F8B is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.4% C 0.167 H 280.2°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#301F8B
RGB	rgb(48, 31, 139)
HSL	hsl(249, 64%, 33%)
HSV	hsv(249, 78%, 55%)
CMYK	cmyk(65.5%, 77.7%, 0%, 45.5%)
CIE-LAB	lab(21.84, 39.96, -56.82)
CIE-LCH	lch(21.84, 69.46, 305.11°)
OKLab	oklab(34.39% 0.0295 -0.164)
OKLCH	oklch(34.39% 0.167 280.2)
XYZ	xyz(6.3676, 3.4719, 24.7557)
Luminance	0.0347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#301F8B #7A8B1F

analogous

#1F448B #301F8B #661F8B

triadic

#301F8B #8B301F #1F8B30

tetradic

#301F8B #8B1F44 #7A8B1F #1F8B66

square

#301F8B #8B1F44 #7A8B1F #1F8B66

split-complementary

#301F8B #8B661F #448B1F

monochromatic

#0D0927 #1F1459 #301F8B #412ABD #634DD7

Accessibility & contrast

On white

12.39

#301F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#301F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #301F8B

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##301F8B	#FFFFFF	#000000	##FFFFFF
##301F8B	1.00	12.39	1.69	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388E

Deuteranopia (green-blind)

#003089

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #301f8b;
/* rgb */ color: rgb(48, 31, 139);
/* oklch */ color: oklch(34.4% 0.167 280.2);

Tailwind

colors: {
  custom: {
    50: '#755dae',
    500: '#301f8b',
    950: '#000000',
  },
}

SCSS

$custom: #301f8b;
$custom-light: #755dae;
$custom-dark: #000000;

JSON

{
  "hex": "#301f8b",
  "rgb": {
    "r": 48,
    "g": 31,
    "b": 139
  },
  "hsl": {
    "h": 249.444,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34385,
    "c": 0.16664,
    "h": 280.2
  },
  "luminance": 0.03472
}

Semantic roles & 50–950 ramp

primary

#301F8B

secondary

#A9BA4C

accent

#E741CD

background

#F7F5FA

surface

#EEE9F4

border

#C9C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #301F8B

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

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