#304EA8#304EA8

#304EA8 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.4% C 0.149 H 266.5°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#304EA8
RGB	rgb(48, 78, 168)
HSL	hsl(225, 56%, 42%)
HSV	hsv(225, 71%, 66%)
CMYK	cmyk(71.4%, 53.6%, 0%, 34.1%)
CIE-LAB	lab(35.80, 20.46, -51.72)
CIE-LCH	lch(35.80, 55.62, 291.58°)
OKLab	oklab(45.4% -0.009 -0.1488)
OKLCH	oklch(45.4% 0.149 266.5)
XYZ	xyz(11.0087, 8.9032, 38.1765)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EA8 #A88A30

analogous

#308AA8 #304EA8 #4E30A8

triadic

#304EA8 #A8304E #4EA830

tetradic

#304EA8 #A8308A #A88A30 #30A84E

square

#304EA8 #A8308A #A88A30 #30A84E

split-complementary

#304EA8 #A84E30 #8AA830

monochromatic

#152249 #223878 #304EA8 #4A6ACB #7A91D9

Accessibility & contrast

On white

7.55

#304EA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#304EA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EA8

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EA8	#FFFFFF	#000000	##FFFFFF
##304EA8	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E5AAB

Deuteranopia (green-blind)

#004FA6

Tritanopia (blue-blind)

#006473

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ea8;
/* rgb */ color: rgb(48, 78, 168);
/* oklch */ color: oklch(45.4% 0.149 266.5);

Tailwind

colors: {
  custom: {
    50: '#787fc2',
    500: '#304ea8',
    950: '#000000',
  },
}

SCSS

$custom: #304ea8;
$custom-light: #787fc2;
$custom-dark: #000000;

JSON

{
  "hex": "#304ea8",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 168
  },
  "hsl": {
    "h": 225,
    "s": 55.556,
    "l": 42.353
  },
  "oklch": {
    "l": 0.45398,
    "c": 0.14905,
    "h": 266.5
  },
  "luminance": 0.08904
}

Semantic roles & 50–950 ramp

primary

#304EA8

secondary

#C1AE73

accent

#B949DF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #304EA8

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

Preview Lab → · Contrast checker → · Palette generator →