#303EA5#303EA5

#303EA5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.0% C 0.165 H 271.3°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#303EA5
RGB	rgb(48, 62, 165)
HSL	hsl(233, 55%, 42%)
HSV	hsv(233, 71%, 65%)
CMYK	cmyk(70.9%, 62.4%, 0%, 35.3%)
CIE-LAB	lab(31.32, 29.93, -57.20)
CIE-LCH	lch(31.32, 64.56, 297.62°)
OKLab	oklab(41.98% 0.0039 -0.1651)
OKLCH	oklch(41.98% 0.165 271.3)
XYZ	xyz(9.7308, 6.7893, 36.3877)
Luminance	0.0679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EA5 #A59730

analogous

#3079A5 #303EA5 #5D30A5

triadic

#303EA5 #A5303E #3EA530

tetradic

#303EA5 #A53079 #A59730 #30A55D

square

#303EA5 #A53079 #A59730 #30A55D

split-complementary

#303EA5 #A55D30 #79A530

monochromatic

#141A46 #222C76 #303EA5 #4858CA #7883D8

Accessibility & contrast

On white

8.91

#303EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#303EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EA5

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EA5	#FFFFFF	#000000	##FFFFFF
##303EA5	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303ea5;
/* rgb */ color: rgb(48, 62, 165);
/* oklch */ color: oklch(42.0% 0.165 271.3);

Tailwind

colors: {
  custom: {
    50: '#7873c1',
    500: '#303ea5',
    950: '#000000',
  },
}

SCSS

$custom: #303ea5;
$custom-light: #7873c1;
$custom-dark: #000000;

JSON

{
  "hex": "#303ea5",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 165
  },
  "hsl": {
    "h": 232.821,
    "s": 54.93,
    "l": 41.765
  },
  "oklch": {
    "l": 0.41979,
    "c": 0.16514,
    "h": 271.3
  },
  "luminance": 0.0679
}

Semantic roles & 50–950 ramp

primary

#303EA5

secondary

#C0B671

accent

#CC4ADE

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303EA5

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

Preview Lab → · Contrast checker → · Palette generator →