#303AB9#303AB9

#303AB9 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.196 H 271.5°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#303AB9
RGB	rgb(48, 58, 185)
HSL	hsl(236, 59%, 46%)
HSV	hsv(236, 74%, 73%)
CMYK	cmyk(74.1%, 68.6%, 0%, 27.5%)
CIE-LAB	lab(32.16, 39.61, -67.76)
CIE-LCH	lch(32.16, 78.49, 300.31°)
OKLab	oklab(43.14% 0.0051 -0.196)
OKLCH	oklch(43.14% 0.196 271.5)
XYZ	xyz(11.4860, 7.1561, 46.6655)
Luminance	0.0716 (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

#303AB9 #B9AF30

analogous

#307FB9 #303AB9 #6A30B9

triadic

#303AB9 #B9303A #3AB930

tetradic

#303AB9 #B9307F #B9AF30 #30B96A

square

#303AB9 #B9307F #B9AF30 #30B96A

split-complementary

#303AB9 #B96A30 #7FB930

monochromatic

#171C58 #232B88 #303AB9 #545DD3 #848BDF

Accessibility & contrast

On white

8.64

#303AB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#303AB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303AB9

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303AB9	#FFFFFF	#000000	##FFFFFF
##303AB9	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BD

Deuteranopia (green-blind)

#0045B7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303ab9;
/* rgb */ color: rgb(48, 58, 185);
/* oklch */ color: oklch(43.1% 0.196 271.5);

Tailwind

colors: {
  custom: {
    50: '#7d71cf',
    500: '#303ab9',
    950: '#000000',
  },
}

SCSS

$custom: #303ab9;
$custom-light: #7d71cf;
$custom-dark: #000000;

JSON

{
  "hex": "#303ab9",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 185
  },
  "hsl": {
    "h": 235.62,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43141,
    "c": 0.19609,
    "h": 271.5
  },
  "luminance": 0.07157
}

Semantic roles & 50–950 ramp

primary

#303AB9

secondary

#C9C37C

accent

#D746E2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #303AB9

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

Preview Lab → · Contrast checker → · Palette generator →