#303C8F#303C8F

#303C8F is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.137 H 272.4°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#303C8F
RGB	rgb(48, 60, 143)
HSL	hsl(232, 50%, 37%)
HSV	hsv(232, 66%, 56%)
CMYK	cmyk(66.4%, 58%, 0%, 43.9%)
CIE-LAB	lab(29.01, 23.18, -47.57)
CIE-LCH	lch(29.01, 52.92, 295.98°)
OKLab	oklab(39.7% 0.0056 -0.1368)
OKLCH	oklch(39.7% 0.137 272.4)
XYZ	xyz(7.7910, 5.8426, 26.6984)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C8F #8F8330

analogous

#306C8F #303C8F #54308F

triadic

#303C8F #8F303C #3C8F30

tetradic

#303C8F #8F306C #8F8330 #308F54

square

#303C8F #8F306C #8F8330 #308F54

split-complementary

#303C8F #8F5430 #6C8F30

monochromatic

#111633 #212961 #303C8F #3F4FBD #6C78CE

Accessibility & contrast

On white

9.68

#303C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#303C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C8F

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C8F	#FFFFFF	#000000	##FFFFFF
##303C8F	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#00408D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #303c8f;
/* rgb */ color: rgb(48, 60, 143);
/* oklch */ color: oklch(39.7% 0.137 272.4);

Tailwind

colors: {
  custom: {
    50: '#7471b0',
    500: '#303c8f',
    950: '#000000',
  },
}

SCSS

$custom: #303c8f;
$custom-light: #7471b0;
$custom-dark: #000000;

JSON

{
  "hex": "#303c8f",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 143
  },
  "hsl": {
    "h": 232.421,
    "s": 49.738,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39704,
    "c": 0.13695,
    "h": 272.4
  },
  "luminance": 0.05843
}

Semantic roles & 50–950 ramp

primary

#303C8F

secondary

#B5AB66

accent

#C84FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #303C8F

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

Preview Lab → · Contrast checker → · Palette generator →