#301BBB#301BBB

#301BBB is a dark, highly saturated blue. Relative luminance 0.050; OKLCH L 39.4% C 0.226 H 274.4°. Best body text is #FFFFFF at 10.50:1 contrast (WCAG AA passes).

Color values

HEX	#301BBB
RGB	rgb(48, 27, 187)
HSL	hsl(248, 75%, 42%)
HSV	hsv(248, 86%, 73%)
CMYK	cmyk(74.3%, 85.6%, 0%, 26.7%)
CIE-LAB	lab(26.73, 56.31, -77.91)
CIE-LCH	lch(26.73, 96.13, 305.86°)
OKLab	oklab(39.38% 0.0173 -0.2252)
OKLCH	oklch(39.38% 0.226 274.4)
XYZ	xyz(10.5775, 4.9990, 47.4115)
Luminance	0.0500 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#301BBB #A6BB1B

analogous

#1B56BB #301BBB #801BBB

triadic

#301BBB #BB301B #1BBB30

tetradic

#301BBB #BB1B56 #A6BB1B #1BBB80

square

#301BBB #BB1B56 #A6BB1B #1BBB80

split-complementary

#301BBB #BB801B #56BB1B

monochromatic

#150C50 #221386 #301BBB #4932E1 #7867E9

Accessibility & contrast

On white

10.50

#301BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#301BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #301BBB

10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##301BBB	#FFFFFF	#000000	##FFFFFF
##301BBB	1.00	10.50	2.00	10.50
#FFFFFF	10.50	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046BF

Deuteranopia (green-blind)

#0038B8

Tritanopia (blue-blind)

#00506F

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #301bbb;
/* rgb */ color: rgb(48, 27, 187);
/* oklch */ color: oklch(39.4% 0.226 274.4);

Tailwind

colors: {
  custom: {
    50: '#805fd1',
    500: '#301bbb',
    950: '#000000',
  },
}

SCSS

$custom: #301bbb;
$custom-light: #805fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#301bbb",
  "rgb": {
    "r": 48,
    "g": 27,
    "b": 187
  },
  "hsl": {
    "h": 247.875,
    "s": 74.766,
    "l": 41.961
  },
  "oklch": {
    "l": 0.39379,
    "c": 0.22588,
    "h": 274.4
  },
  "luminance": 0.05
}

Semantic roles & 50–950 ramp

primary

#301BBB

secondary

#C0CE63

accent

#F136D9

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #301BBB

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

Preview Lab → · Contrast checker → · Palette generator →