#304C8B#304C8B

#304C8B is a dark, moderate blue. Relative luminance 0.077; OKLCH L 42.8% C 0.110 H 264.3°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#304C8B
RGB	rgb(48, 76, 139)
HSL	hsl(222, 49%, 37%)
HSV	hsv(222, 65%, 55%)
CMYK	cmyk(65.5%, 45.3%, 0%, 45.5%)
CIE-LAB	lab(33.27, 10.91, -38.26)
CIE-LCH	lch(33.27, 39.79, 285.91°)
OKLab	oklab(42.84% -0.011 -0.1092)
OKLCH	oklch(42.84% 0.11 264.3)
XYZ	xyz(8.4619, 7.6606, 25.4538)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304C8B #8B6F30

analogous

#307A8B #304C8B #41308B

triadic

#304C8B #8B304C #4C8B30

tetradic

#304C8B #8B307A #8B6F30 #308B41

square

#304C8B #8B307A #8B6F30 #308B41

split-complementary

#304C8B #8B4130 #7A8B30

monochromatic

#111A30 #20335E #304C8B #4065B8 #6A88CC

Accessibility & contrast

On white

8.29

#304C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#304C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304C8B

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304C8B	#FFFFFF	#000000	##FFFFFF
##304C8B	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E538D

Deuteranopia (green-blind)

#204A8A

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #304c8b;
/* rgb */ color: rgb(48, 76, 139);
/* oklch */ color: oklch(42.8% 0.110 264.3);

Tailwind

colors: {
  custom: {
    50: '#727dad',
    500: '#304c8b',
    950: '#000000',
  },
}

SCSS

$custom: #304c8b;
$custom-light: #727dad;
$custom-dark: #000000;

JSON

{
  "hex": "#304c8b",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 139
  },
  "hsl": {
    "h": 221.538,
    "s": 48.663,
    "l": 36.667
  },
  "oklch": {
    "l": 0.4284,
    "c": 0.10977,
    "h": 264.3
  },
  "luminance": 0.07661
}

Semantic roles & 50–950 ramp

primary

#304C8B

secondary

#B39B64

accent

#AE50D8

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #304C8B

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

Preview Lab → · Contrast checker → · Palette generator →