#303AB5#303AB5

#303AB5 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.191 H 271.7°. Best body text is #FFFFFF at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#303AB5
RGB	rgb(48, 58, 181)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(73.5%, 68%, 0%, 29%)
CIE-LAB	lab(31.78, 38.21, -66.01)
CIE-LCH	lch(31.78, 76.27, 300.07°)
OKLab	oklab(42.75% 0.0055 -0.1909)
OKLCH	oklch(42.75% 0.191 271.7)
XYZ	xyz(11.0696, 6.9895, 44.4728)
Luminance	0.0699 (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

#303AB5 #B5AB30

analogous

#307CB5 #303AB5 #6930B5

triadic

#303AB5 #B5303A #3AB530

tetradic

#303AB5 #B5307C #B5AB30 #30B569

square

#303AB5 #B5307C #B5AB30 #30B569

split-complementary

#303AB5 #B56930 #7CB530

monochromatic

#161B54 #232A85 #303AB5 #515BD1 #8289DE

Accessibility & contrast

On white

8.76

#303AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#303AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303AB5

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303AB5	#FFFFFF	#000000	##FFFFFF
##303AB5	1.00	8.76	2.40	8.76
#FFFFFF	8.76	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B9

Deuteranopia (green-blind)

#0044B3

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303ab5;
/* rgb */ color: rgb(48, 58, 181);
/* oklch */ color: oklch(42.8% 0.191 271.7);

Tailwind

colors: {
  custom: {
    50: '#7c70cc',
    500: '#303ab5',
    950: '#000000',
  },
}

SCSS

$custom: #303ab5;
$custom-light: #7c70cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303ab5",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 181
  },
  "hsl": {
    "h": 235.489,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42754,
    "c": 0.19098,
    "h": 271.7
  },
  "luminance": 0.06991
}

Semantic roles & 50–950 ramp

primary

#303AB5

secondary

#C7C17A

accent

#D646E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #303AB5

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

Preview Lab → · Contrast checker → · Palette generator →