#303CBB#303CBB

#303CBB is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.196 H 271.1°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#303CBB
RGB	rgb(48, 60, 187)
HSL	hsl(235, 59%, 46%)
HSV	hsv(235, 74%, 73%)
CMYK	cmyk(74.3%, 67.9%, 0%, 26.7%)
CIE-LAB	lab(32.80, 39.08, -67.88)
CIE-LCH	lch(32.80, 78.33, 299.93°)
OKLab	oklab(43.66% 0.0038 -0.1964)
OKLCH	oklch(43.66% 0.196 271.1)
XYZ	xyz(11.8014, 7.4467, 47.8195)
Luminance	0.0745 (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

#303CBB #BBAF30

analogous

#3081BB #303CBB #6930BB

triadic

#303CBB #BB303C #3CBB30

tetradic

#303CBB #BB3081 #BBAF30 #30BB69

square

#303CBB #BB3081 #BBAF30 #30BB69

split-complementary

#303CBB #BB6930 #81BB30

monochromatic

#171D5A #232C8A #303CBB #5560D3 #868DE0

Accessibility & contrast

On white

8.44

#303CBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#303CBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CBB

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CBB	#FFFFFF	#000000	##FFFFFF
##303CBB	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303cbb;
/* rgb */ color: rgb(48, 60, 187);
/* oklch */ color: oklch(43.7% 0.196 271.1);

Tailwind

colors: {
  custom: {
    50: '#7e72d1',
    500: '#303cbb',
    950: '#000000',
  },
}

SCSS

$custom: #303cbb;
$custom-light: #7e72d1;
$custom-dark: #000000;

JSON

{
  "hex": "#303cbb",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 187
  },
  "hsl": {
    "h": 234.82,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43664,
    "c": 0.19641,
    "h": 271.1
  },
  "luminance": 0.07448
}

Semantic roles & 50–950 ramp

primary

#303CBB

secondary

#C9C37D

accent

#D545E2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #303CBB

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

Preview Lab → · Contrast checker → · Palette generator →