#303BBF#303BBF

#303BBF is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 43.9% C 0.203 H 271.1°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#303BBF
RGB	rgb(48, 59, 191)
HSL	hsl(235, 60%, 47%)
HSV	hsv(235, 75%, 75%)
CMYK	cmyk(74.9%, 69.1%, 0%, 25.1%)
CIE-LAB	lab(32.96, 41.09, -69.99)
CIE-LCH	lch(32.96, 81.16, 300.42°)
OKLab	oklab(43.89% 0.0039 -0.2025)
OKLCH	oklch(43.89% 0.203 271.1)
XYZ	xyz(12.1837, 7.5166, 50.0889)
Luminance	0.0752 (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

#303BBF #BFB430

analogous

#3082BF #303BBF #6D30BF

triadic

#303BBF #BF303B #3BBF30

tetradic

#303BBF #BF3082 #BFB430 #30BF6D

square

#303BBF #BF3082 #BFB430 #30BF6D

split-complementary

#303BBF #BF6D30 #82BF30

monochromatic

#171D5D #242C8E #303BBF #5761D5 #888FE1

Accessibility & contrast

On white

8.39

#303BBF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#303BBF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BBF

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BBF	#FFFFFF	#000000	##FFFFFF
##303BBF	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C3

Deuteranopia (green-blind)

#0047BD

Tritanopia (blue-blind)

#005F78

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303bbf;
/* rgb */ color: rgb(48, 59, 191);
/* oklch */ color: oklch(43.9% 0.203 271.1);

Tailwind

colors: {
  custom: {
    50: '#7f71d3',
    500: '#303bbf',
    950: '#000000',
  },
}

SCSS

$custom: #303bbf;
$custom-light: #7f71d3;
$custom-dark: #000000;

JSON

{
  "hex": "#303bbf",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 191
  },
  "hsl": {
    "h": 235.385,
    "s": 59.833,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43889,
    "c": 0.20256,
    "h": 271.1
  },
  "luminance": 0.07518
}

Semantic roles & 50–950 ramp

primary

#303BBF

secondary

#CBC580

accent

#D745E3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #303BBF

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

Preview Lab → · Contrast checker → · Palette generator →