#3F33B9#3F33B9

#3F33B9 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 43.0% C 0.200 H 277.9°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F33B9
RGB	rgb(63, 51, 185)
HSL	hsl(245, 57%, 46%)
HSV	hsv(245, 72%, 73%)
CMYK	cmyk(65.9%, 72.4%, 0%, 27.5%)
CIE-LAB	lab(31.64, 45.41, -68.58)
CIE-LCH	lch(31.64, 82.25, 303.51°)
OKLab	oklab(43.02% 0.0274 -0.198)
OKLCH	oklch(43.02% 0.2 277.9)
XYZ	xyz(11.9879, 6.9262, 46.5947)
Luminance	0.0693 (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

#3F33B9 #ADB933

analogous

#336AB9 #3F33B9 #8233B9

triadic

#3F33B9 #B93F33 #33B93F

tetradic

#3F33B9 #B9336A #ADB933 #33B982

square

#3F33B9 #B9336A #ADB933 #33B982

split-complementary

#3F33B9 #B98233 #6AB933

monochromatic

#1E1959 #2F2689 #3F33B9 #6358D1 #9088DE

Accessibility & contrast

On white

8.80

#3F33B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3F33B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F33B9

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F33B9	#FFFFFF	#000000	##FFFFFF
##3F33B9	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BD

Deuteranopia (green-blind)

#0045B7

Tritanopia (blue-blind)

#005873

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f33b9;
/* rgb */ color: rgb(63, 51, 185);
/* oklch */ color: oklch(43.0% 0.200 277.9);

Tailwind

colors: {
  custom: {
    50: '#846dcf',
    500: '#3f33b9',
    950: '#000000',
  },
}

SCSS

$custom: #3f33b9;
$custom-light: #846dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f33b9",
  "rgb": {
    "r": 63,
    "g": 51,
    "b": 185
  },
  "hsl": {
    "h": 245.373,
    "s": 56.78,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43022,
    "c": 0.19991,
    "h": 277.9
  },
  "luminance": 0.06927
}

Semantic roles & 50–950 ramp

primary

#3F33B9

secondary

#C2C880

accent

#E048D2

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3F33B9

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

Preview Lab → · Contrast checker → · Palette generator →