#304F8F#304F8F

#304F8F is a dark, moderate blue. Relative luminance 0.082; OKLCH L 43.8% C 0.112 H 263.1°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#304F8F
RGB	rgb(48, 79, 143)
HSL	hsl(220, 50%, 37%)
HSV	hsv(220, 66%, 56%)
CMYK	cmyk(66.4%, 44.8%, 0%, 43.9%)
CIE-LAB	lab(34.40, 10.40, -38.89)
CIE-LCH	lch(34.40, 40.26, 284.98°)
OKLab	oklab(43.79% -0.0134 -0.111)
OKLCH	oklch(43.79% 0.112 263.1)
XYZ	xyz(8.9711, 8.2027, 27.0918)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304F8F #8F7030

analogous

#307F8F #304F8F #41308F

triadic

#304F8F #8F304F #4F8F30

tetradic

#304F8F #8F307F #8F7030 #308F41

square

#304F8F #8F307F #8F7030 #308F41

split-complementary

#304F8F #8F4130 #7F8F30

monochromatic

#111C33 #213661 #304F8F #3F68BD #6C8CCE

Accessibility & contrast

On white

7.95

#304F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#304F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304F8F

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304F8F	#FFFFFF	#000000	##FFFFFF
##304F8F	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315691

Deuteranopia (green-blind)

#214D8E

Tritanopia (blue-blind)

#005E68

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #304f8f;
/* rgb */ color: rgb(48, 79, 143);
/* oklch */ color: oklch(43.8% 0.112 263.1);

Tailwind

colors: {
  custom: {
    50: '#737fb0',
    500: '#304f8f',
    950: '#000000',
  },
}

SCSS

$custom: #304f8f;
$custom-light: #737fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#304f8f",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 143
  },
  "hsl": {
    "h": 220.421,
    "s": 49.738,
    "l": 37.451
  },
  "oklch": {
    "l": 0.43794,
    "c": 0.11184,
    "h": 263.1
  },
  "luminance": 0.08204
}

Semantic roles & 50–950 ramp

primary

#304F8F

secondary

#B59B66

accent

#AC4FD9

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #304F8F

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

Preview Lab → · Contrast checker → · Palette generator →