#303C91#303C91

#303C91 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.140 H 272.3°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#303C91
RGB	rgb(48, 60, 145)
HSL	hsl(233, 50%, 38%)
HSV	hsv(233, 67%, 57%)
CMYK	cmyk(66.9%, 58.6%, 0%, 43.1%)
CIE-LAB	lab(29.17, 23.92, -48.55)
CIE-LCH	lch(29.17, 54.12, 296.23°)
OKLab	oklab(39.87% 0.0057 -0.1397)
OKLCH	oklch(39.87% 0.14 272.3)
XYZ	xyz(7.9439, 5.9037, 27.5035)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C91 #918530

analogous

#306D91 #303C91 #543091

triadic

#303C91 #91303C #3C9130

tetradic

#303C91 #91306D #918530 #309154

square

#303C91 #91306D #918530 #309154

split-complementary

#303C91 #915430 #6D9130

monochromatic

#121635 #212963 #303C91 #3F4FBF #6D79CF

Accessibility & contrast

On white

9.63

#303C91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#303C91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C91

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C91	#FFFFFF	#000000	##FFFFFF
##303C91	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#00418F

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #303c91;
/* rgb */ color: rgb(48, 60, 145);
/* oklch */ color: oklch(39.9% 0.140 272.3);

Tailwind

colors: {
  custom: {
    50: '#7471b2',
    500: '#303c91',
    950: '#000000',
  },
}

SCSS

$custom: #303c91;
$custom-light: #7471b2;
$custom-dark: #000000;

JSON

{
  "hex": "#303c91",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 145
  },
  "hsl": {
    "h": 232.577,
    "s": 50.259,
    "l": 37.843
  },
  "oklch": {
    "l": 0.3987,
    "c": 0.13982,
    "h": 272.3
  },
  "luminance": 0.05904
}

Semantic roles & 50–950 ramp

primary

#303C91

secondary

#B6AC67

accent

#C84EDA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #303C91

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

Preview Lab → · Contrast checker → · Palette generator →