#303BBB#303BBB

#303BBB is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.5% C 0.198 H 271.3°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#303BBB
RGB	rgb(48, 59, 187)
HSL	hsl(235, 59%, 46%)
HSV	hsv(235, 74%, 73%)
CMYK	cmyk(74.3%, 68.4%, 0%, 26.7%)
CIE-LAB	lab(32.58, 39.70, -68.26)
CIE-LCH	lch(32.58, 78.96, 300.18°)
OKLab	oklab(43.5% 0.0043 -0.1975)
OKLCH	oklch(43.5% 0.198 271.3)
XYZ	xyz(11.7495, 7.3429, 47.8022)
Luminance	0.0734 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303BBB #BBB030

analogous

#3080BB #303BBB #6A30BB

triadic

#303BBB #BB303B #3BBB30

tetradic

#303BBB #BB3080 #BBB030 #30BB6A

square

#303BBB #BB3080 #BBB030 #30BB6A

split-complementary

#303BBB #BB6A30 #80BB30

monochromatic

#171C5A #232C8A #303BBB #555FD3 #868DE0

Accessibility & contrast

On white

8.51

#303BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#303BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BBB

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BBB	#FFFFFF	#000000	##FFFFFF
##303BBB	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0046B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303bbb;
/* rgb */ color: rgb(48, 59, 187);
/* oklch */ color: oklch(43.5% 0.198 271.3);

Tailwind

colors: {
  custom: {
    50: '#7e71d1',
    500: '#303bbb',
    950: '#000000',
  },
}

SCSS

$custom: #303bbb;
$custom-light: #7e71d1;
$custom-dark: #000000;

JSON

{
  "hex": "#303bbb",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 187
  },
  "hsl": {
    "h": 235.252,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43499,
    "c": 0.19752,
    "h": 271.3
  },
  "luminance": 0.07344
}

Semantic roles & 50–950 ramp

primary

#303BBB

secondary

#C9C37D

accent

#D645E2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #303BBB

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

Preview Lab → · Contrast checker → · Palette generator →