#303FB6#303FB6

#303FB6 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.187 H 270.7°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#303FB6
RGB	rgb(48, 63, 182)
HSL	hsl(233, 58%, 45%)
HSV	hsv(233, 74%, 71%)
CMYK	cmyk(73.6%, 65.4%, 0%, 28.6%)
CIE-LAB	lab(33.05, 35.43, -64.52)
CIE-LCH	lch(33.05, 73.61, 298.77°)
OKLab	oklab(43.7% 0.0024 -0.1865)
OKLCH	oklch(43.7% 0.187 270.7)
XYZ	xyz(11.4371, 7.5596, 45.1033)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FB6 #B6A730

analogous

#3082B6 #303FB6 #6430B6

triadic

#303FB6 #B6303F #3FB630

tetradic

#303FB6 #B63082 #B6A730 #30B664

square

#303FB6 #B63082 #B6A730 #30B664

split-complementary

#303FB6 #B66430 #82B630

monochromatic

#161D55 #232E86 #303FB6 #5260D1 #828DDE

Accessibility & contrast

On white

8.36

#303FB6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#303FB6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FB6

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FB6	#FFFFFF	#000000	##FFFFFF
##303FB6	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BA

Deuteranopia (green-blind)

#0047B4

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #303fb6;
/* rgb */ color: rgb(48, 63, 182);
/* oklch */ color: oklch(43.7% 0.187 270.7);

Tailwind

colors: {
  custom: {
    50: '#7c74cd',
    500: '#303fb6',
    950: '#000000',
  },
}

SCSS

$custom: #303fb6;
$custom-light: #7c74cd;
$custom-dark: #000000;

JSON

{
  "hex": "#303fb6",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 182
  },
  "hsl": {
    "h": 233.284,
    "s": 58.261,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43704,
    "c": 0.18655,
    "h": 270.7
  },
  "luminance": 0.07561
}

Semantic roles & 50–950 ramp

primary

#303FB6

secondary

#C7BF7B

accent

#D046E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303FB6

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

Preview Lab → · Contrast checker → · Palette generator →