#3F30BB#3F30BB

#3F30BB is a dark, highly saturated blue. Relative luminance 0.068; OKLCH L 42.8% C 0.205 H 278.1°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#3F30BB
RGB	rgb(63, 48, 187)
HSL	hsl(246, 59%, 46%)
HSV	hsv(246, 74%, 73%)
CMYK	cmyk(66.3%, 74.3%, 0%, 26.7%)
CIE-LAB	lab(31.25, 47.69, -70.40)
CIE-LCH	lch(31.25, 85.04, 304.11°)
OKLab	oklab(42.81% 0.0288 -0.2033)
OKLCH	oklch(42.81% 0.205 278.1)
XYZ	xyz(12.0736, 6.7575, 47.6721)
Luminance	0.0676 (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

#3F30BB #ACBB30

analogous

#3066BB #3F30BB #8430BB

triadic

#3F30BB #BB3F30 #30BB3F

tetradic

#3F30BB #BB3066 #ACBB30 #30BB84

square

#3F30BB #BB3066 #ACBB30 #30BB84

split-complementary

#3F30BB #BB8430 #66BB30

monochromatic

#1E175A #2F238A #3F30BB #6355D3 #8F86E0

Accessibility & contrast

On white

8.93

#3F30BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3F30BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30BB

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30BB	#FFFFFF	#000000	##FFFFFF
##3F30BB	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0044B8

Tritanopia (blue-blind)

#005873

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f30bb;
/* rgb */ color: rgb(63, 48, 187);
/* oklch */ color: oklch(42.8% 0.205 278.1);

Tailwind

colors: {
  custom: {
    50: '#856bd1',
    500: '#3f30bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f30bb;
$custom-light: #856bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30bb",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 187
  },
  "hsl": {
    "h": 246.475,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.42805,
    "c": 0.20537,
    "h": 278.1
  },
  "luminance": 0.06759
}

Semantic roles & 50–950 ramp

primary

#3F30BB

secondary

#C1C97D

accent

#E245D1

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F30BB

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

Preview Lab → · Contrast checker → · Palette generator →