#3F30B2#3F30B2

#3F30B2 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.9% C 0.194 H 279.1°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F30B2
RGB	rgb(63, 48, 178)
HSL	hsl(247, 58%, 44%)
HSV	hsv(247, 73%, 70%)
CMYK	cmyk(64.6%, 73%, 0%, 30.2%)
CIE-LAB	lab(30.36, 44.86, -66.52)
CIE-LCH	lch(30.36, 80.23, 303.99°)
OKLab	oklab(41.91% 0.0307 -0.192)
OKLCH	oklch(41.91% 0.194 279.1)
XYZ	xyz(11.1402, 6.3841, 42.7560)
Luminance	0.0639 (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

#3F30B2 #A3B230

analogous

#3062B2 #3F30B2 #8030B2

triadic

#3F30B2 #B23F30 #30B23F

tetradic

#3F30B2 #B23062 #A3B230 #30B280

square

#3F30B2 #B23062 #A3B230 #30B280

split-complementary

#3F30B2 #B28030 #62B230

monochromatic

#1D1652 #2E2382 #3F30B2 #5E50D0 #8A80DD

Accessibility & contrast

On white

9.22

#3F30B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#3F30B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30B2

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30B2	#FFFFFF	#000000	##FFFFFF
##3F30B2	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB6

Deuteranopia (green-blind)

#0042B0

Tritanopia (blue-blind)

#00546E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3f30b2;
/* rgb */ color: rgb(63, 48, 178);
/* oklch */ color: oklch(41.9% 0.194 279.1);

Tailwind

colors: {
  custom: {
    50: '#836aca',
    500: '#3f30b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f30b2;
$custom-light: #836aca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30b2",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 178
  },
  "hsl": {
    "h": 246.923,
    "s": 57.522,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4191,
    "c": 0.19445,
    "h": 279.1
  },
  "luminance": 0.06385
}

Semantic roles & 50–950 ramp

primary

#3F30B2

secondary

#BDC678

accent

#E147CF

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F30B2

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

Preview Lab → · Contrast checker → · Palette generator →