#304DB1#304DB1

#304DB1 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.9% C 0.163 H 267.3°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#304DB1
RGB	rgb(48, 77, 177)
HSL	hsl(227, 57%, 44%)
HSV	hsv(227, 73%, 69%)
CMYK	cmyk(72.9%, 56.5%, 0%, 30.6%)
CIE-LAB	lab(36.19, 24.50, -56.43)
CIE-LCH	lch(36.19, 61.52, 293.47°)
OKLab	oklab(45.91% -0.0076 -0.1626)
OKLCH	oklch(45.91% 0.163 267.3)
XYZ	xyz(11.8059, 9.1092, 42.7225)
Luminance	0.0911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304DB1 #B19430

analogous

#308EB1 #304DB1 #5430B1

triadic

#304DB1 #B1304D #4DB130

tetradic

#304DB1 #B1308E #B19430 #30B154

square

#304DB1 #B1308E #B19430 #30B154

split-complementary

#304DB1 #B15430 #8EB130

monochromatic

#162351 #233881 #304DB1 #4F6CCF #7F94DC

Accessibility & contrast

On white

7.44

#304DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#304DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304DB1

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304DB1	#FFFFFF	#000000	##FFFFFF
##304DB1	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB4

Deuteranopia (green-blind)

#004FAF

Tritanopia (blue-blind)

#006677

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304db1;
/* rgb */ color: rgb(48, 77, 177);
/* oklch */ color: oklch(45.9% 0.163 267.3);

Tailwind

colors: {
  custom: {
    50: '#7a7ec9',
    500: '#304db1',
    950: '#000000',
  },
}

SCSS

$custom: #304db1;
$custom-light: #7a7ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#304db1",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 177
  },
  "hsl": {
    "h": 226.512,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.45908,
    "c": 0.16282,
    "h": 267.3
  },
  "luminance": 0.0911
}

Semantic roles & 50–950 ramp

primary

#304DB1

secondary

#C5B478

accent

#BE47E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #304DB1

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

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