#303BB5#303BB5

#303BB5 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.9% C 0.190 H 271.5°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#303BB5
RGB	rgb(48, 59, 181)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(73.5%, 67.4%, 0%, 29%)
CIE-LAB	lab(32.01, 37.59, -65.63)
CIE-LCH	lch(32.01, 75.63, 299.80°)
OKLab	oklab(42.92% 0.0049 -0.1898)
OKLCH	oklch(42.92% 0.19 271.5)
XYZ	xyz(11.1206, 7.0914, 44.4898)
Luminance	0.0709 (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

#303BB5 #B5AA30

analogous

#307DB5 #303BB5 #6830B5

triadic

#303BB5 #B5303B #3BB530

tetradic

#303BB5 #B5307D #B5AA30 #30B568

square

#303BB5 #B5307D #B5AA30 #30B568

split-complementary

#303BB5 #B56830 #7DB530

monochromatic

#161B54 #232B85 #303BB5 #515CD1 #8289DE

Accessibility & contrast

On white

8.68

#303BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#303BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BB5

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BB5	#FFFFFF	#000000	##FFFFFF
##303BB5	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0045B3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303bb5;
/* rgb */ color: rgb(48, 59, 181);
/* oklch */ color: oklch(42.9% 0.190 271.5);

Tailwind

colors: {
  custom: {
    50: '#7c71cc',
    500: '#303bb5',
    950: '#000000',
  },
}

SCSS

$custom: #303bb5;
$custom-light: #7c71cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303bb5",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 181
  },
  "hsl": {
    "h": 235.038,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42922,
    "c": 0.18985,
    "h": 271.5
  },
  "luminance": 0.07093
}

Semantic roles & 50–950 ramp

primary

#303BB5

secondary

#C7C07A

accent

#D446E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #303BB5

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

Preview Lab → · Contrast checker → · Palette generator →