#3F30B8#3F30B8

#3F30B8 is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.5% C 0.202 H 278.4°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#3F30B8
RGB	rgb(63, 48, 184)
HSL	hsl(247, 59%, 45%)
HSV	hsv(247, 74%, 72%)
CMYK	cmyk(65.8%, 73.9%, 0%, 27.8%)
CIE-LAB	lab(30.95, 46.75, -69.12)
CIE-LCH	lch(30.95, 83.44, 304.07°)
OKLab	oklab(42.5% 0.0295 -0.1996)
OKLCH	oklch(42.5% 0.202 278.4)
XYZ	xyz(11.7558, 6.6304, 45.9984)
Luminance	0.0663 (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

#3F30B8 #A9B830

analogous

#3065B8 #3F30B8 #8330B8

triadic

#3F30B8 #B83F30 #30B83F

tetradic

#3F30B8 #B83065 #A9B830 #30B883

square

#3F30B8 #B83065 #A9B830 #30B883

split-complementary

#3F30B8 #B88330 #65B830

monochromatic

#1E1757 #2E2387 #3F30B8 #6153D2 #8E84DF

Accessibility & contrast

On white

9.03

#3F30B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3F30B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30B8

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30B8	#FFFFFF	#000000	##FFFFFF
##3F30B8	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBC

Deuteranopia (green-blind)

#0043B6

Tritanopia (blue-blind)

#005771

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3f30b8;
/* rgb */ color: rgb(63, 48, 184);
/* oklch */ color: oklch(42.5% 0.202 278.4);

Tailwind

colors: {
  custom: {
    50: '#846bcf',
    500: '#3f30b8',
    950: '#000000',
  },
}

SCSS

$custom: #3f30b8;
$custom-light: #846bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30b8",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 184
  },
  "hsl": {
    "h": 246.618,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42504,
    "c": 0.20175,
    "h": 278.4
  },
  "luminance": 0.06631
}

Semantic roles & 50–950 ramp

primary

#3F30B8

secondary

#C0C87C

accent

#E246D1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F30B8

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

Preview Lab → · Contrast checker → · Palette generator →