#303B91#303B91

#303B91 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.141 H 272.7°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#303B91
RGB	rgb(48, 59, 145)
HSL	hsl(233, 50%, 38%)
HSV	hsv(233, 67%, 57%)
CMYK	cmyk(66.9%, 59.3%, 0%, 43.1%)
CIE-LAB	lab(28.90, 24.59, -48.98)
CIE-LCH	lch(28.90, 54.81, 296.66°)
OKLab	oklab(39.67% 0.0066 -0.141)
OKLCH	oklch(39.67% 0.141 272.7)
XYZ	xyz(7.8920, 5.7999, 27.4862)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303B91 #918630

analogous

#306B91 #303B91 #553091

triadic

#303B91 #91303B #3B9130

tetradic

#303B91 #91306B #918630 #309155

square

#303B91 #91306B #918630 #309155

split-complementary

#303B91 #915530 #6B9130

monochromatic

#121635 #212863 #303B91 #3F4EBF #6D78CF

Accessibility & contrast

On white

9.72

#303B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#303B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303B91

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303B91	#FFFFFF	#000000	##FFFFFF
##303B91	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#00408F

Tritanopia (blue-blind)

#005060

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #303b91;
/* rgb */ color: rgb(48, 59, 145);
/* oklch */ color: oklch(39.7% 0.141 272.7);

Tailwind

colors: {
  custom: {
    50: '#7470b2',
    500: '#303b91',
    950: '#000000',
  },
}

SCSS

$custom: #303b91;
$custom-light: #7470b2;
$custom-dark: #000000;

JSON

{
  "hex": "#303b91",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 145
  },
  "hsl": {
    "h": 233.196,
    "s": 50.259,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39672,
    "c": 0.14113,
    "h": 272.7
  },
  "luminance": 0.05801
}

Semantic roles & 50–950 ramp

primary

#303B91

secondary

#B6AD67

accent

#CA4EDA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #303B91

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

Preview Lab → · Contrast checker → · Palette generator →