#304EA3#304EA3

#304EA3 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.0% C 0.142 H 266.2°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#304EA3
RGB	rgb(48, 78, 163)
HSL	hsl(224, 55%, 41%)
HSV	hsv(224, 71%, 64%)
CMYK	cmyk(70.6%, 52.1%, 0%, 36.1%)
CIE-LAB	lab(35.44, 18.58, -49.31)
CIE-LCH	lch(35.44, 52.70, 290.65°)
OKLab	oklab(45.01% -0.0095 -0.1417)
OKLCH	oklch(45.01% 0.142 266.2)
XYZ	xyz(10.5519, 8.7204, 35.7703)
Luminance	0.0872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EA3 #A38530

analogous

#3088A3 #304EA3 #4C30A3

triadic

#304EA3 #A3304E #4EA330

tetradic

#304EA3 #A33088 #A38530 #30A34C

square

#304EA3 #A33088 #A38530 #30A34C

split-complementary

#304EA3 #A34C30 #88A330

monochromatic

#142144 #223774 #304EA3 #4769C9 #7790D7

Accessibility & contrast

On white

7.65

#304EA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#304EA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EA3

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EA3	#FFFFFF	#000000	##FFFFFF
##304EA3	1.00	7.65	2.74	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1959A6

Deuteranopia (green-blind)

#004EA1

Tritanopia (blue-blind)

#006271

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #304ea3;
/* rgb */ color: rgb(48, 78, 163);
/* oklch */ color: oklch(45.0% 0.142 266.2);

Tailwind

colors: {
  custom: {
    50: '#777fbf',
    500: '#304ea3',
    950: '#000000',
  },
}

SCSS

$custom: #304ea3;
$custom-light: #777fbf;
$custom-dark: #000000;

JSON

{
  "hex": "#304ea3",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 163
  },
  "hsl": {
    "h": 224.348,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45014,
    "c": 0.142,
    "h": 266.2
  },
  "luminance": 0.08722
}

Semantic roles & 50–950 ramp

primary

#304EA3

secondary

#BFAA70

accent

#B74ADE

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #304EA3

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

Preview Lab → · Contrast checker → · Palette generator →