#303FB0#303FB0

#303FB0 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.179 H 270.9°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#303FB0
RGB	rgb(48, 63, 176)
HSL	hsl(233, 57%, 44%)
HSV	hsv(233, 73%, 69%)
CMYK	cmyk(72.7%, 64.2%, 0%, 31%)
CIE-LAB	lab(32.52, 33.27, -61.83)
CIE-LCH	lch(32.52, 70.21, 298.29°)
OKLab	oklab(43.15% 0.0027 -0.1786)
OKLCH	oklch(43.15% 0.179 270.9)
XYZ	xyz(10.8302, 7.3169, 41.9074)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FB0 #B0A130

analogous

#307FB0 #303FB0 #6130B0

triadic

#303FB0 #B0303F #3FB030

tetradic

#303FB0 #B0307F #B0A130 #30B061

square

#303FB0 #B0307F #B0A130 #30B061

split-complementary

#303FB0 #B06130 #7FB030

monochromatic

#161D50 #232E80 #303FB0 #4E5DCF #7E89DC

Accessibility & contrast

On white

8.52

#303FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#303FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FB0

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FB0	#FFFFFF	#000000	##FFFFFF
##303FB0	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0047AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303fb0;
/* rgb */ color: rgb(48, 63, 176);
/* oklch */ color: oklch(43.2% 0.179 270.9);

Tailwind

colors: {
  custom: {
    50: '#7b74c9',
    500: '#303fb0',
    950: '#000000',
  },
}

SCSS

$custom: #303fb0;
$custom-light: #7b74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#303fb0",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 232.969,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43152,
    "c": 0.17867,
    "h": 270.9
  },
  "luminance": 0.07318
}

Semantic roles & 50–950 ramp

primary

#303FB0

secondary

#C5BC77

accent

#CE47E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303FB0

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

Preview Lab → · Contrast checker → · Palette generator →