#303CB3#303CB3

#303CB3 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.9% C 0.186 H 271.4°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#303CB3
RGB	rgb(48, 60, 179)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 70%)
CMYK	cmyk(73.2%, 66.5%, 0%, 29.8%)
CIE-LAB	lab(32.06, 36.26, -64.36)
CIE-LCH	lch(32.06, 73.87, 299.40°)
OKLab	oklab(42.9% 0.0045 -0.1861)
OKLCH	oklch(42.9% 0.186 271.4)
XYZ	xyz(10.9687, 7.1136, 43.4341)
Luminance	0.0712 (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

#303CB3 #B3A730

analogous

#307EB3 #303CB3 #6630B3

triadic

#303CB3 #B3303C #3CB330

tetradic

#303CB3 #B3307E #B3A730 #30B366

square

#303CB3 #B3307E #B3A730 #30B366

split-complementary

#303CB3 #B36630 #7EB330

monochromatic

#161C52 #232C83 #303CB3 #505CD0 #8089DD

Accessibility & contrast

On white

8.67

#303CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#303CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB3

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB3	#FFFFFF	#000000	##FFFFFF
##303CB3	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303cb3;
/* rgb */ color: rgb(48, 60, 179);
/* oklch */ color: oklch(42.9% 0.186 271.4);

Tailwind

colors: {
  custom: {
    50: '#7c72cb',
    500: '#303cb3',
    950: '#000000',
  },
}

SCSS

$custom: #303cb3;
$custom-light: #7c72cb;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb3",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 179
  },
  "hsl": {
    "h": 234.504,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42902,
    "c": 0.18612,
    "h": 271.4
  },
  "luminance": 0.07115
}

Semantic roles & 50–950 ramp

primary

#303CB3

secondary

#C6BF79

accent

#D347E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303CB3

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

Preview Lab → · Contrast checker → · Palette generator →