#303EB3#303EB3

#303EB3 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.184 H 271.0°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#303EB3
RGB	rgb(48, 62, 179)
HSL	hsl(234, 58%, 45%)
HSV	hsv(234, 73%, 70%)
CMYK	cmyk(73.2%, 65.4%, 0%, 29.8%)
CIE-LAB	lab(32.54, 34.99, -63.58)
CIE-LCH	lch(32.54, 72.57, 298.83°)
OKLab	oklab(43.25% 0.0032 -0.1838)
OKLCH	oklch(43.25% 0.184 271)
XYZ	xyz(11.0755, 7.3272, 43.4697)
Luminance	0.0733 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EB3 #B3A530

analogous

#3080B3 #303EB3 #6430B3

triadic

#303EB3 #B3303E #3EB330

tetradic

#303EB3 #B33080 #B3A530 #30B364

square

#303EB3 #B33080 #B3A530 #30B364

split-complementary

#303EB3 #B36430 #80B330

monochromatic

#161D52 #232D83 #303EB3 #505ED0 #808ADD

Accessibility & contrast

On white

8.52

#303EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#303EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EB3

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EB3	#FFFFFF	#000000	##FFFFFF
##303EB3	1.00	8.52	2.47	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0046B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303eb3;
/* rgb */ color: rgb(48, 62, 179);
/* oklch */ color: oklch(43.3% 0.184 271.0);

Tailwind

colors: {
  custom: {
    50: '#7c73cb',
    500: '#303eb3',
    950: '#000000',
  },
}

SCSS

$custom: #303eb3;
$custom-light: #7c73cb;
$custom-dark: #000000;

JSON

{
  "hex": "#303eb3",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 179
  },
  "hsl": {
    "h": 233.588,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4325,
    "c": 0.18381,
    "h": 271
  },
  "luminance": 0.07328
}

Semantic roles & 50–950 ramp

primary

#303EB3

secondary

#C6BE79

accent

#D047E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303EB3

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

Preview Lab → · Contrast checker → · Palette generator →