#304188#304188

#304188 is a dark, moderate blue. Relative luminance 0.062; OKLCH L 40.2% C 0.120 H 270.1°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#304188
RGB	rgb(48, 65, 136)
HSL	hsl(228, 48%, 36%)
HSV	hsv(228, 65%, 53%)
CMYK	cmyk(64.7%, 52.2%, 0%, 46.7%)
CIE-LAB	lab(29.88, 17.21, -41.86)
CIE-LCH	lch(29.88, 45.25, 292.35°)
OKLab	oklab(40.19% 0.0002 -0.1199)
OKLCH	oklch(40.19% 0.12 270.1)
XYZ	xyz(7.5517, 6.1859, 24.0838)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304188 #887730

analogous

#306D88 #304188 #4B3088

triadic

#304188 #883041 #418830

tetradic

#304188 #88306D #887730 #30884B

square

#304188 #88306D #887730 #30884B

split-complementary

#304188 #884B30 #6D8830

monochromatic

#10162E #202B5B #304188 #4057B5 #697BCA

Accessibility & contrast

On white

9.39

#304188 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#304188 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304188

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304188	#FFFFFF	#000000	##FFFFFF
##304188	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194A8B

Deuteranopia (green-blind)

#014387

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #304188;
/* rgb */ color: rgb(48, 65, 136);
/* oklch */ color: oklch(40.2% 0.120 270.1);

Tailwind

colors: {
  custom: {
    50: '#7275ab',
    500: '#304188',
    950: '#000000',
  },
}

SCSS

$custom: #304188;
$custom-light: #7275ab;
$custom-dark: #000000;

JSON

{
  "hex": "#304188",
  "rgb": {
    "r": 48,
    "g": 65,
    "b": 136
  },
  "hsl": {
    "h": 228.409,
    "s": 47.826,
    "l": 36.078
  },
  "oklch": {
    "l": 0.4019,
    "c": 0.11994,
    "h": 270.1
  },
  "luminance": 0.06187
}

Semantic roles & 50–950 ramp

primary

#304188

secondary

#B1A263

accent

#BD50D7

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #304188

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

Preview Lab → · Contrast checker → · Palette generator →