#304BB6#304BB6

#304BB6 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.9% C 0.172 H 268.0°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#304BB6
RGB	rgb(48, 75, 182)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 74%, 71%)
CMYK	cmyk(73.6%, 58.8%, 0%, 28.6%)
CIE-LAB	lab(36.05, 27.68, -59.61)
CIE-LCH	lch(36.05, 65.72, 294.91°)
OKLab	oklab(45.93% -0.0059 -0.172)
OKLCH	oklch(45.93% 0.172 268)
XYZ	xyz(12.1756, 9.0366, 45.3495)
Luminance	0.0904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB6 #B69B30

analogous

#308EB6 #304BB6 #5830B6

triadic

#304BB6 #B6304B #4BB630

tetradic

#304BB6 #B6308E #B69B30 #30B658

square

#304BB6 #B6308E #B69B30 #30B658

split-complementary

#304BB6 #B65830 #8EB630

monochromatic

#162355 #233786 #304BB6 #526CD1 #8295DE

Accessibility & contrast

On white

7.48

#304BB6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#304BB6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB6

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB6	#FFFFFF	#000000	##FFFFFF
##304BB6	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBA

Deuteranopia (green-blind)

#004FB4

Tritanopia (blue-blind)

#006679

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304bb6;
/* rgb */ color: rgb(48, 75, 182);
/* oklch */ color: oklch(45.9% 0.172 268.0);

Tailwind

colors: {
  custom: {
    50: '#7b7dcd',
    500: '#304bb6',
    950: '#000000',
  },
}

SCSS

$custom: #304bb6;
$custom-light: #7b7dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb6",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 182
  },
  "hsl": {
    "h": 227.91,
    "s": 58.261,
    "l": 45.098
  },
  "oklch": {
    "l": 0.45926,
    "c": 0.17211,
    "h": 268
  },
  "luminance": 0.09038
}

Semantic roles & 50–950 ramp

primary

#304BB6

secondary

#C7B87B

accent

#C246E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304BB6

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

Preview Lab → · Contrast checker → · Palette generator →