#3F33B5#3F33B5

#3F33B5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.6% C 0.195 H 278.3°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#3F33B5
RGB	rgb(63, 51, 181)
HSL	hsl(246, 56%, 45%)
HSV	hsv(246, 72%, 71%)
CMYK	cmyk(65.2%, 71.8%, 0%, 29%)
CIE-LAB	lab(31.25, 44.13, -66.84)
CIE-LCH	lch(31.25, 80.10, 303.44°)
OKLab	oklab(42.63% 0.0281 -0.1929)
OKLCH	oklch(42.63% 0.195 278.3)
XYZ	xyz(11.5715, 6.7597, 44.4021)
Luminance	0.0676 (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

#3F33B5 #A9B533

analogous

#3368B5 #3F33B5 #8033B5

triadic

#3F33B5 #B53F33 #33B53F

tetradic

#3F33B5 #B53368 #A9B533 #33B580

square

#3F33B5 #B53368 #A9B533 #33B580

split-complementary

#3F33B5 #B58033 #68B533

monochromatic

#1E1856 #2E2685 #3F33B5 #6156CF #8E86DD

Accessibility & contrast

On white

8.93

#3F33B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3F33B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33B5

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33B5	#FFFFFF	#000000	##FFFFFF
##3F33B5	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB9

Deuteranopia (green-blind)

#0044B3

Tritanopia (blue-blind)

#005770

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f33b5;
/* rgb */ color: rgb(63, 51, 181);
/* oklch */ color: oklch(42.6% 0.195 278.3);

Tailwind

colors: {
  custom: {
    50: '#836ccc',
    500: '#3f33b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f33b5;
$custom-light: #836ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33b5",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 181
  },
  "hsl": {
    "h": 245.538,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42632,
    "c": 0.19499,
    "h": 278.3
  },
  "luminance": 0.06761
}

Semantic roles & 50–950 ramp

primary

#3F33B5

secondary

#C0C67D

accent

#DF48D1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F33B5

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

Preview Lab → · Contrast checker → · Palette generator →