#304BB5#304BB5

#304BB5 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.8% C 0.171 H 268.0°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#304BB5
RGB	rgb(48, 75, 181)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 73%, 71%)
CMYK	cmyk(73.5%, 58.6%, 0%, 29%)
CIE-LAB	lab(35.98, 27.30, -59.15)
CIE-LCH	lch(35.98, 65.15, 294.78°)
OKLab	oklab(45.84% -0.0059 -0.1707)
OKLCH	oklch(45.84% 0.171 268)
XYZ	xyz(12.0726, 8.9955, 44.8071)
Luminance	0.0900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB5 #B59A30

analogous

#308DB5 #304BB5 #5830B5

triadic

#304BB5 #B5304B #4BB530

tetradic

#304BB5 #B5308D #B59A30 #30B558

square

#304BB5 #B5308D #B59A30 #30B558

split-complementary

#304BB5 #B55830 #8DB530

monochromatic

#162354 #233785 #304BB5 #516BD1 #8294DE

Accessibility & contrast

On white

7.50

#304BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#304BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB5

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB5	#FFFFFF	#000000	##FFFFFF
##304BB5	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB9

Deuteranopia (green-blind)

#004FB3

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304bb5;
/* rgb */ color: rgb(48, 75, 181);
/* oklch */ color: oklch(45.8% 0.171 268.0);

Tailwind

colors: {
  custom: {
    50: '#7b7dcc',
    500: '#304bb5',
    950: '#000000',
  },
}

SCSS

$custom: #304bb5;
$custom-light: #7b7dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb5",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 181
  },
  "hsl": {
    "h": 227.82,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.45842,
    "c": 0.17076,
    "h": 268
  },
  "luminance": 0.08997
}

Semantic roles & 50–950 ramp

primary

#304BB5

secondary

#C7B77A

accent

#C246E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304BB5

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

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