#303DAF#303DAF

#303DAF is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.180 H 271.3°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#303DAF
RGB	rgb(48, 61, 175)
HSL	hsl(234, 57%, 44%)
HSV	hsv(234, 73%, 69%)
CMYK	cmyk(72.6%, 65.1%, 0%, 31.4%)
CIE-LAB	lab(31.94, 34.20, -62.18)
CIE-LCH	lch(31.94, 70.96, 298.81°)
OKLab	oklab(42.7% 0.0041 -0.1797)
OKLCH	oklch(42.7% 0.18 271.3)
XYZ	xyz(10.6229, 7.0599, 41.3520)
Luminance	0.0706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.92

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DAF #AFA230

analogous

#307CAF #303DAF #6230AF

triadic

#303DAF #AF303D #3DAF30

tetradic

#303DAF #AF307C #AFA230 #30AF62

square

#303DAF #AF307C #AFA230 #30AF62

split-complementary

#303DAF #AF6230 #7CAF30

monochromatic

#161C4F #232C7F #303DAF #4E5BCE #7E87DC

Accessibility & contrast

On white

8.71

#303DAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#303DAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DAF

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DAF	#FFFFFF	#000000	##FFFFFF
##303DAF	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B3

Deuteranopia (green-blind)

#0045AD

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303daf;
/* rgb */ color: rgb(48, 61, 175);
/* oklch */ color: oklch(42.7% 0.180 271.3);

Tailwind

colors: {
  custom: {
    50: '#7b72c8',
    500: '#303daf',
    950: '#000000',
  },
}

SCSS

$custom: #303daf;
$custom-light: #7b72c8;
$custom-dark: #000000;

JSON

{
  "hex": "#303daf",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 175
  },
  "hsl": {
    "h": 233.858,
    "s": 56.951,
    "l": 43.725
  },
  "oklch": {
    "l": 0.42703,
    "c": 0.17973,
    "h": 271.3
  },
  "luminance": 0.07061
}

Semantic roles & 50–950 ramp

primary

#303DAF

secondary

#C4BC76

accent

#D148E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303DAF

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

Preview Lab → · Contrast checker → · Palette generator →