#303DBB#303DBB

#303DBB is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.195 H 270.9°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#303DBB
RGB	rgb(48, 61, 187)
HSL	hsl(234, 59%, 46%)
HSV	hsv(234, 74%, 73%)
CMYK	cmyk(74.3%, 67.4%, 0%, 26.7%)
CIE-LAB	lab(33.03, 38.46, -67.50)
CIE-LCH	lch(33.03, 77.69, 299.68°)
OKLab	oklab(43.83% 0.0032 -0.1953)
OKLCH	oklch(43.83% 0.195 270.9)
XYZ	xyz(11.8543, 7.5525, 47.8371)
Luminance	0.0755 (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

#303DBB #BBAE30

analogous

#3082BB #303DBB #6830BB

triadic

#303DBB #BB303D #3DBB30

tetradic

#303DBB #BB3082 #BBAE30 #30BB68

square

#303DBB #BB3082 #BBAE30 #30BB68

split-complementary

#303DBB #BB6830 #82BB30

monochromatic

#171D5A #232D8A #303DBB #5561D3 #868EE0

Accessibility & contrast

On white

8.36

#303DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#303DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DBB

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DBB	#FFFFFF	#000000	##FFFFFF
##303DBB	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #303dbb;
/* rgb */ color: rgb(48, 61, 187);
/* oklch */ color: oklch(43.8% 0.195 270.9);

Tailwind

colors: {
  custom: {
    50: '#7d73d1',
    500: '#303dbb',
    950: '#000000',
  },
}

SCSS

$custom: #303dbb;
$custom-light: #7d73d1;
$custom-dark: #000000;

JSON

{
  "hex": "#303dbb",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 187
  },
  "hsl": {
    "h": 234.388,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43831,
    "c": 0.1953,
    "h": 270.9
  },
  "luminance": 0.07554
}

Semantic roles & 50–950 ramp

primary

#303DBB

secondary

#C9C27D

accent

#D445E2

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #303DBB

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

Preview Lab → · Contrast checker → · Palette generator →