#303FB9#303FB9

#303FB9 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.190 H 270.6°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#303FB9
RGB	rgb(48, 63, 185)
HSL	hsl(233, 59%, 46%)
HSV	hsv(233, 74%, 73%)
CMYK	cmyk(74.1%, 65.9%, 0%, 27.5%)
CIE-LAB	lab(33.32, 36.50, -65.86)
CIE-LCH	lch(33.32, 75.30, 299.00°)
OKLab	oklab(43.98% 0.0022 -0.1904)
OKLCH	oklch(43.98% 0.19 270.6)
XYZ	xyz(11.7504, 7.6849, 46.7536)
Luminance	0.0769 (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

#303FB9 #B9AA30

analogous

#3083B9 #303FB9 #6630B9

triadic

#303FB9 #B9303F #3FB930

tetradic

#303FB9 #B93083 #B9AA30 #30B966

square

#303FB9 #B93083 #B9AA30 #30B966

split-complementary

#303FB9 #B96630 #83B930

monochromatic

#171E58 #232E88 #303FB9 #5462D3 #848EDF

Accessibility & contrast

On white

8.28

#303FB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#303FB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FB9

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FB9	#FFFFFF	#000000	##FFFFFF
##303FB9	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#0048B7

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #303fb9;
/* rgb */ color: rgb(48, 63, 185);
/* oklch */ color: oklch(44.0% 0.190 270.6);

Tailwind

colors: {
  custom: {
    50: '#7d74cf',
    500: '#303fb9',
    950: '#000000',
  },
}

SCSS

$custom: #303fb9;
$custom-light: #7d74cf;
$custom-dark: #000000;

JSON

{
  "hex": "#303fb9",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 185
  },
  "hsl": {
    "h": 233.431,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43983,
    "c": 0.19045,
    "h": 270.6
  },
  "luminance": 0.07686
}

Semantic roles & 50–950 ramp

primary

#303FB9

secondary

#C9C07C

accent

#D146E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303FB9

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

Preview Lab → · Contrast checker → · Palette generator →