#303E8F#303E8F

#303E8F is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.1% C 0.134 H 271.6°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#303E8F
RGB	rgb(48, 62, 143)
HSL	hsl(231, 50%, 37%)
HSV	hsv(231, 66%, 56%)
CMYK	cmyk(66.4%, 56.6%, 0%, 43.9%)
CIE-LAB	lab(29.55, 21.83, -46.70)
CIE-LCH	lch(29.55, 51.55, 295.06°)
OKLab	oklab(40.11% 0.0037 -0.1342)
OKLCH	oklch(40.11% 0.134 271.6)
XYZ	xyz(7.8978, 6.0561, 26.7340)
Luminance	0.0606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303E8F #8F8130

analogous

#306D8F #303E8F #52308F

triadic

#303E8F #8F303E #3E8F30

tetradic

#303E8F #8F306D #8F8130 #308F52

square

#303E8F #8F306D #8F8130 #308F52

split-complementary

#303E8F #8F5230 #6D8F30

monochromatic

#111633 #212A61 #303E8F #3F52BD #6C7ACE

Accessibility & contrast

On white

9.50

#303E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#303E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303E8F

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303E8F	#FFFFFF	#000000	##FFFFFF
##303E8F	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A92

Deuteranopia (green-blind)

#00428D

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #303e8f;
/* rgb */ color: rgb(48, 62, 143);
/* oklch */ color: oklch(40.1% 0.134 271.6);

Tailwind

colors: {
  custom: {
    50: '#7473b0',
    500: '#303e8f',
    950: '#000000',
  },
}

SCSS

$custom: #303e8f;
$custom-light: #7473b0;
$custom-dark: #000000;

JSON

{
  "hex": "#303e8f",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 143
  },
  "hsl": {
    "h": 231.158,
    "s": 49.738,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40109,
    "c": 0.13427,
    "h": 271.6
  },
  "luminance": 0.06057
}

Semantic roles & 50–950 ramp

primary

#303E8F

secondary

#B5A966

accent

#C54FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090811

muted

#7B7B80

Preview Lab

Preview with #303E8F

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

Preview Lab → · Contrast checker → · Palette generator →