#303E9B#303E9B

#303E9B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.151 H 271.5°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#303E9B
RGB	rgb(48, 62, 155)
HSL	hsl(232, 53%, 40%)
HSV	hsv(232, 69%, 61%)
CMYK	cmyk(69%, 60%, 0%, 39.2%)
CIE-LAB	lab(30.50, 26.26, -52.50)
CIE-LCH	lch(30.50, 58.71, 296.58°)
OKLab	oklab(41.11% 0.004 -0.1513)
OKLCH	oklch(41.11% 0.151 271.5)
XYZ	xyz(8.8559, 6.4394, 31.7802)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303E9B #9B8D30

analogous

#30739B #303E9B #58309B

triadic

#303E9B #9B303E #3E9B30

tetradic

#303E9B #9B3073 #9B8D30 #309B58

square

#303E9B #9B3073 #9B8D30 #309B58

split-complementary

#303E9B #9B5830 #739B30

monochromatic

#13193E #222B6C #303E9B #4354C5 #727FD3

Accessibility & contrast

On white

9.18

#303E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#303E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303E9B

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303E9B	#FFFFFF	#000000	##FFFFFF
##303E9B	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004399

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303e9b;
/* rgb */ color: rgb(48, 62, 155);
/* oklch */ color: oklch(41.1% 0.151 271.5);

Tailwind

colors: {
  custom: {
    50: '#7673b9',
    500: '#303e9b',
    950: '#000000',
  },
}

SCSS

$custom: #303e9b;
$custom-light: #7673b9;
$custom-dark: #000000;

JSON

{
  "hex": "#303e9b",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 155
  },
  "hsl": {
    "h": 232.15,
    "s": 52.709,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41108,
    "c": 0.15135,
    "h": 271.5
  },
  "luminance": 0.0644
}

Semantic roles & 50–950 ramp

primary

#303E9B

secondary

#BBB16C

accent

#C94CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303E9B

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

Preview Lab → · Contrast checker → · Palette generator →