#3F30B5#3F30B5

#3F30B5 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 42.2% C 0.198 H 278.7°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#3F30B5
RGB	rgb(63, 48, 181)
HSL	hsl(247, 58%, 45%)
HSV	hsv(247, 73%, 71%)
CMYK	cmyk(65.2%, 73.5%, 0%, 29%)
CIE-LAB	lab(30.65, 45.81, -67.83)
CIE-LCH	lch(30.65, 81.84, 304.03°)
OKLab	oklab(42.21% 0.0301 -0.1958)
OKLCH	oklch(42.21% 0.198 278.7)
XYZ	xyz(11.4447, 6.5059, 44.3598)
Luminance	0.0651 (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

#3F30B5 #A6B530

analogous

#3063B5 #3F30B5 #8230B5

triadic

#3F30B5 #B53F30 #30B53F

tetradic

#3F30B5 #B53063 #A6B530 #30B582

square

#3F30B5 #B53063 #A6B530 #30B582

split-complementary

#3F30B5 #B58230 #63B530

monochromatic

#1D1654 #2E2385 #3F30B5 #6051D1 #8C82DE

Accessibility & contrast

On white

9.12

#3F30B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3F30B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30B5

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30B5	#FFFFFF	#000000	##FFFFFF
##3F30B5	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB9

Deuteranopia (green-blind)

#0043B3

Tritanopia (blue-blind)

#005570

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3f30b5;
/* rgb */ color: rgb(63, 48, 181);
/* oklch */ color: oklch(42.2% 0.198 278.7);

Tailwind

colors: {
  custom: {
    50: '#836bcc',
    500: '#3f30b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f30b5;
$custom-light: #836bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30b5",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 181
  },
  "hsl": {
    "h": 246.767,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42206,
    "c": 0.19812,
    "h": 278.7
  },
  "luminance": 0.06507
}

Semantic roles & 50–950 ramp

primary

#3F30B5

secondary

#BEC77A

accent

#E146D0

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F30B5

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

Preview Lab → · Contrast checker → · Palette generator →