#304B8B#304B8B

#304B8B is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.6% C 0.111 H 264.9°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#304B8B
RGB	rgb(48, 75, 139)
HSL	hsl(222, 49%, 37%)
HSV	hsv(222, 65%, 55%)
CMYK	cmyk(65.5%, 46%, 0%, 45.5%)
CIE-LAB	lab(32.97, 11.58, -38.74)
CIE-LCH	lch(32.97, 40.43, 286.64°)
OKLab	oklab(42.61% -0.0099 -0.1106)
OKLCH	oklch(42.61% 0.111 264.9)
XYZ	xyz(8.3936, 7.5238, 25.4310)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304B8B #8B7030

analogous

#30798B #304B8B #43308B

triadic

#304B8B #8B304B #4B8B30

tetradic

#304B8B #8B3079 #8B7030 #308B43

square

#304B8B #8B3079 #8B7030 #308B43

split-complementary

#304B8B #8B4330 #798B30

monochromatic

#111A30 #20325E #304B8B #4064B8 #6A87CC

Accessibility & contrast

On white

8.38

#304B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#304B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304B8B

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304B8B	#FFFFFF	#000000	##FFFFFF
##304B8B	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C528D

Deuteranopia (green-blind)

#1D4A8A

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #304b8b;
/* rgb */ color: rgb(48, 75, 139);
/* oklch */ color: oklch(42.6% 0.111 264.9);

Tailwind

colors: {
  custom: {
    50: '#727cad',
    500: '#304b8b',
    950: '#000000',
  },
}

SCSS

$custom: #304b8b;
$custom-light: #727cad;
$custom-dark: #000000;

JSON

{
  "hex": "#304b8b",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 139
  },
  "hsl": {
    "h": 222.198,
    "s": 48.663,
    "l": 36.667
  },
  "oklch": {
    "l": 0.42614,
    "c": 0.11106,
    "h": 264.9
  },
  "luminance": 0.07525
}

Semantic roles & 50–950 ramp

primary

#304B8B

secondary

#B39B64

accent

#B050D8

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #304B8B

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

Preview Lab → · Contrast checker → · Palette generator →