#301FBB#301FBB

#301FBB is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.8% C 0.223 H 274.2°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#301FBB
RGB	rgb(48, 31, 187)
HSL	hsl(247, 72%, 43%)
HSV	hsv(247, 83%, 73%)
CMYK	cmyk(74.3%, 83.4%, 0%, 26.7%)
CIE-LAB	lab(27.28, 54.68, -77.00)
CIE-LCH	lch(27.28, 94.44, 305.38°)
OKLab	oklab(39.76% 0.0162 -0.2226)
OKLCH	oklch(39.76% 0.223 274.2)
XYZ	xyz(10.6756, 5.1951, 47.4442)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#301FBB #AABB1F

analogous

#1F5CBB #301FBB #7E1FBB

triadic

#301FBB #BB301F #1FBB30

tetradic

#301FBB #BB1F5C #AABB1F #1FBB7E

square

#301FBB #BB1F5C #AABB1F #1FBB7E

split-complementary

#301FBB #BB7E1F #5CBB1F

monochromatic

#150E52 #231687 #301FBB #4B39DE #7B6EE7

Accessibility & contrast

On white

10.30

#301FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#301FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #301FBB

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##301FBB	#FFFFFF	#000000	##FFFFFF
##301FBB	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047BF

Deuteranopia (green-blind)

#0039B8

Tritanopia (blue-blind)

#005270

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #301fbb;
/* rgb */ color: rgb(48, 31, 187);
/* oklch */ color: oklch(39.8% 0.223 274.2);

Tailwind

colors: {
  custom: {
    50: '#8061d1',
    500: '#301fbb',
    950: '#000000',
  },
}

SCSS

$custom: #301fbb;
$custom-light: #8061d1;
$custom-dark: #000000;

JSON

{
  "hex": "#301fbb",
  "rgb": {
    "r": 48,
    "g": 31,
    "b": 187
  },
  "hsl": {
    "h": 246.538,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.39757,
    "c": 0.22323,
    "h": 274.2
  },
  "luminance": 0.05196
}

Semantic roles & 50–950 ramp

primary

#301FBB

secondary

#C2CD69

accent

#EE3ADB

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #301FBB

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

Preview Lab → · Contrast checker → · Palette generator →