#3F30A4#3F30A4

#3F30A4 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.6% C 0.177 H 280.9°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F30A4
RGB	rgb(63, 48, 164)
HSL	hsl(248, 55%, 42%)
HSV	hsv(248, 71%, 64%)
CMYK	cmyk(61.6%, 70.7%, 0%, 35.7%)
CIE-LAB	lab(29.03, 40.40, -60.31)
CIE-LCH	lch(29.03, 72.59, 303.82°)
OKLab	oklab(40.56% 0.0334 -0.1738)
OKLCH	oklch(40.56% 0.177 280.9)
XYZ	xyz(9.8056, 5.8503, 35.7273)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.21

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F30A4 #95A430

analogous

#305BA4 #3F30A4 #7930A4

triadic

#3F30A4 #A43F30 #30A43F

tetradic

#3F30A4 #A4305B #95A430 #30A479

square

#3F30A4 #A4305B #95A430 #30A479

split-complementary

#3F30A4 #A47930 #5BA430

monochromatic

#1B1445 #2D2275 #3F30A4 #5948C9 #8477D7

Accessibility & contrast

On white

9.68

#3F30A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#3F30A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30A4

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30A4	#FFFFFF	#000000	##FFFFFF
##3F30A4	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A7

Deuteranopia (green-blind)

#0040A2

Tritanopia (blue-blind)

#004F66

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3f30a4;
/* rgb */ color: rgb(63, 48, 164);
/* oklch */ color: oklch(40.6% 0.177 280.9);

Tailwind

colors: {
  custom: {
    50: '#806ac0',
    500: '#3f30a4',
    950: '#000000',
  },
}

SCSS

$custom: #3f30a4;
$custom-light: #806ac0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30a4",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 164
  },
  "hsl": {
    "h": 247.759,
    "s": 54.717,
    "l": 41.569
  },
  "oklch": {
    "l": 0.40558,
    "c": 0.17701,
    "h": 280.9
  },
  "luminance": 0.05851
}

Semantic roles & 50–950 ramp

primary

#3F30A4

secondary

#B5BF70

accent

#DE4ACB

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3F30A4

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

Preview Lab → · Contrast checker → · Palette generator →