#304EA5#304EA5

#304EA5 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.2% C 0.145 H 266.3°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#304EA5
RGB	rgb(48, 78, 165)
HSL	hsl(225, 55%, 42%)
HSV	hsv(225, 71%, 65%)
CMYK	cmyk(70.9%, 52.7%, 0%, 35.3%)
CIE-LAB	lab(35.58, 19.33, -50.28)
CIE-LCH	lch(35.58, 53.87, 291.03°)
OKLab	oklab(45.17% -0.0093 -0.1445)
OKLCH	oklch(45.17% 0.145 266.3)
XYZ	xyz(10.7325, 8.7927, 36.7216)
Luminance	0.0879 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EA5 #A58730

analogous

#3089A5 #304EA5 #4C30A5

triadic

#304EA5 #A5304E #4EA530

tetradic

#304EA5 #A53089 #A58730 #30A54C

square

#304EA5 #A53089 #A58730 #30A54C

split-complementary

#304EA5 #A54C30 #89A530

monochromatic

#142146 #223876 #304EA5 #486ACA #7890D8

Accessibility & contrast

On white

7.61

#304EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#304EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EA5

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EA5	#FFFFFF	#000000	##FFFFFF
##304EA5	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1559A8

Deuteranopia (green-blind)

#004FA3

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ea5;
/* rgb */ color: rgb(48, 78, 165);
/* oklch */ color: oklch(45.2% 0.145 266.3);

Tailwind

colors: {
  custom: {
    50: '#777fc0',
    500: '#304ea5',
    950: '#000000',
  },
}

SCSS

$custom: #304ea5;
$custom-light: #777fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#304ea5",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 165
  },
  "hsl": {
    "h": 224.615,
    "s": 54.93,
    "l": 41.765
  },
  "oklch": {
    "l": 0.45167,
    "c": 0.14483,
    "h": 266.3
  },
  "luminance": 0.08794
}

Semantic roles & 50–950 ramp

primary

#304EA5

secondary

#C0AC71

accent

#B84ADE

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #304EA5

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

Preview Lab → · Contrast checker → · Palette generator →