#304AB7#304AB7

#304AB7 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.8% C 0.175 H 268.3°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#304AB7
RGB	rgb(48, 74, 183)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 74%, 72%)
CMYK	cmyk(73.8%, 59.6%, 0%, 28.2%)
CIE-LAB	lab(35.88, 28.70, -60.49)
CIE-LCH	lch(35.88, 66.96, 295.38°)
OKLab	oklab(45.82% -0.0051 -0.1746)
OKLCH	oklch(45.82% 0.175 268.3)
XYZ	xyz(12.2120, 8.9435, 45.8732)
Luminance	0.0895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB7 #B79D30

analogous

#308EB7 #304AB7 #5930B7

triadic

#304AB7 #B7304A #4AB730

tetradic

#304AB7 #B7308E #B79D30 #30B759

square

#304AB7 #B7308E #B79D30 #30B759

split-complementary

#304AB7 #B75930 #8EB730

monochromatic

#172356 #233687 #304AB7 #526BD2 #8395DE

Accessibility & contrast

On white

7.53

#304AB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#304AB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB7

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB7	#FFFFFF	#000000	##FFFFFF
##304AB7	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBB

Deuteranopia (green-blind)

#004EB5

Tritanopia (blue-blind)

#006579

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ab7;
/* rgb */ color: rgb(48, 74, 183);
/* oklch */ color: oklch(45.8% 0.175 268.3);

Tailwind

colors: {
  custom: {
    50: '#7b7ccd',
    500: '#304ab7',
    950: '#000000',
  },
}

SCSS

$custom: #304ab7;
$custom-light: #7b7ccd;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab7",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 183
  },
  "hsl": {
    "h": 228.444,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.45817,
    "c": 0.1747,
    "h": 268.3
  },
  "luminance": 0.08945
}

Semantic roles & 50–950 ramp

primary

#304AB7

secondary

#C8B97B

accent

#C446E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #304AB7

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

Preview Lab → · Contrast checker → · Palette generator →