#3F34B5#3F34B5

#3F34B5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.8% C 0.194 H 278.1°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F34B5
RGB	rgb(63, 52, 181)
HSL	hsl(245, 55%, 46%)
HSV	hsv(245, 71%, 71%)
CMYK	cmyk(65.2%, 71.3%, 0%, 29%)
CIE-LAB	lab(31.46, 43.56, -66.50)
CIE-LCH	lch(31.46, 79.50, 303.23°)
OKLab	oklab(42.78% 0.0275 -0.192)
OKLCH	oklch(42.78% 0.194 278.1)
XYZ	xyz(11.6157, 6.8480, 44.4168)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 4.02

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F34B5 #AAB534

analogous

#3469B5 #3F34B5 #7F34B5

triadic

#3F34B5 #B53F34 #34B53F

tetradic

#3F34B5 #B53469 #AAB534 #34B57F

square

#3F34B5 #B53469 #AAB534 #34B57F

split-complementary

#3F34B5 #B57F34 #69B534

monochromatic

#1E1956 #2E2685 #3F34B5 #6257CF #8E87DC

Accessibility & contrast

On white

8.86

#3F34B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3F34B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F34B5

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F34B5	#FFFFFF	#000000	##FFFFFF
##3F34B5	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB9

Deuteranopia (green-blind)

#0045B3

Tritanopia (blue-blind)

#005771

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f34b5;
/* rgb */ color: rgb(63, 52, 181);
/* oklch */ color: oklch(42.8% 0.194 278.1);

Tailwind

colors: {
  custom: {
    50: '#836dcc',
    500: '#3f34b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f34b5;
$custom-light: #836dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f34b5",
  "rgb": {
    "r": 63,
    "g": 52,
    "b": 181
  },
  "hsl": {
    "h": 245.116,
    "s": 55.365,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42778,
    "c": 0.19392,
    "h": 278.1
  },
  "luminance": 0.06849
}

Semantic roles & 50–950 ramp

primary

#3F34B5

secondary

#C0C67F

accent

#DF49D2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F34B5

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

Preview Lab → · Contrast checker → · Palette generator →