#303BB3#303BB3

#303BB3 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.187 H 271.6°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#303BB3
RGB	rgb(48, 59, 179)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 70%)
CMYK	cmyk(73.2%, 67%, 0%, 29.8%)
CIE-LAB	lab(31.83, 36.88, -64.74)
CIE-LCH	lch(31.83, 74.51, 299.67°)
OKLab	oklab(42.73% 0.0051 -0.1872)
OKLCH	oklch(42.73% 0.187 271.6)
XYZ	xyz(10.9168, 7.0099, 43.4168)
Luminance	0.0701 (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

#303BB3 #B3A830

analogous

#307DB3 #303BB3 #6730B3

triadic

#303BB3 #B3303B #3BB330

tetradic

#303BB3 #B3307D #B3A830 #30B367

square

#303BB3 #B3307D #B3A830 #30B367

split-complementary

#303BB3 #B36730 #7DB330

monochromatic

#161B52 #232B83 #303BB3 #505BD0 #8088DD

Accessibility & contrast

On white

8.74

#303BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#303BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BB3

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BB3	#FFFFFF	#000000	##FFFFFF
##303BB3	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303bb3;
/* rgb */ color: rgb(48, 59, 179);
/* oklch */ color: oklch(42.7% 0.187 271.6);

Tailwind

colors: {
  custom: {
    50: '#7c71cb',
    500: '#303bb3',
    950: '#000000',
  },
}

SCSS

$custom: #303bb3;
$custom-light: #7c71cb;
$custom-dark: #000000;

JSON

{
  "hex": "#303bb3",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 179
  },
  "hsl": {
    "h": 234.962,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42731,
    "c": 0.18727,
    "h": 271.6
  },
  "luminance": 0.07011
}

Semantic roles & 50–950 ramp

primary

#303BB3

secondary

#C6C079

accent

#D447E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #303BB3

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

Preview Lab → · Contrast checker → · Palette generator →