#303A88#303A88

#303A88 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.129 H 273.3°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#303A88
RGB	rgb(48, 58, 136)
HSL	hsl(233, 48%, 36%)
HSV	hsv(233, 65%, 53%)
CMYK	cmyk(64.7%, 57.4%, 0%, 46.7%)
CIE-LAB	lab(27.93, 21.95, -45.00)
CIE-LCH	lch(27.93, 50.07, 296.01°)
OKLab	oklab(38.73% 0.0074 -0.1293)
OKLCH	oklch(38.73% 0.129 273.3)
XYZ	xyz(7.1744, 5.4315, 23.9581)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303A88 #887E30

analogous

#306688 #303A88 #523088

triadic

#303A88 #88303A #3A8830

tetradic

#303A88 #883066 #887E30 #308852

square

#303A88 #883066 #887E30 #308852

split-complementary

#303A88 #885230 #668830

monochromatic

#10132E #20275B #303A88 #404DB5 #6974CA

Accessibility & contrast

On white

10.07

#303A88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#303A88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303A88

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303A88	#FFFFFF	#000000	##FFFFFF
##303A88	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468B

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #303a88;
/* rgb */ color: rgb(48, 58, 136);
/* oklch */ color: oklch(38.7% 0.129 273.3);

Tailwind

colors: {
  custom: {
    50: '#7270ab',
    500: '#303a88',
    950: '#000000',
  },
}

SCSS

$custom: #303a88;
$custom-light: #7270ab;
$custom-dark: #000000;

JSON

{
  "hex": "#303a88",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 136
  },
  "hsl": {
    "h": 233.182,
    "s": 47.826,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38726,
    "c": 0.12949,
    "h": 273.3
  },
  "luminance": 0.05432
}

Semantic roles & 50–950 ramp

primary

#303A88

secondary

#B1A863

accent

#C850D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303A88

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

Preview Lab → · Contrast checker → · Palette generator →