#304FAB#304FAB

#304FAB is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.8% C 0.152 H 266.4°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#304FAB
RGB	rgb(48, 79, 171)
HSL	hsl(225, 56%, 43%)
HSV	hsv(225, 72%, 67%)
CMYK	cmyk(71.9%, 53.8%, 0%, 32.9%)
CIE-LAB	lab(36.29, 20.93, -52.71)
CIE-LCH	lch(36.29, 56.72, 291.65°)
OKLab	oklab(45.84% -0.0096 -0.1517)
OKLCH	oklch(45.84% 0.152 266.4)
XYZ	xyz(11.3630, 9.1594, 39.6893)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FAB #AB8C30

analogous

#308CAB #304FAB #4E30AB

triadic

#304FAB #AB304F #4FAB30

tetradic

#304FAB #AB308C #AB8C30 #30AB4E

square

#304FAB #AB308C #AB8C30 #30AB4E

split-complementary

#304FAB #AB4E30 #8CAB30

monochromatic

#15234B #23397B #304FAB #4C6CCD #7B93DA

Accessibility & contrast

On white

7.41

#304FAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#304FAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FAB

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FAB	#FFFFFF	#000000	##FFFFFF
##304FAB	1.00	7.41	2.83	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B5BAE

Deuteranopia (green-blind)

#0050A9

Tritanopia (blue-blind)

#006575

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304fab;
/* rgb */ color: rgb(48, 79, 171);
/* oklch */ color: oklch(45.8% 0.152 266.4);

Tailwind

colors: {
  custom: {
    50: '#787fc5',
    500: '#304fab',
    950: '#000000',
  },
}

SCSS

$custom: #304fab;
$custom-light: #787fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#304fab",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 171
  },
  "hsl": {
    "h": 224.878,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45839,
    "c": 0.15198,
    "h": 266.4
  },
  "luminance": 0.09161
}

Semantic roles & 50–950 ramp

primary

#304FAB

secondary

#C3AF74

accent

#B948DF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #304FAB

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

Preview Lab → · Contrast checker → · Palette generator →