#3F39CB#3F39CB

#3F39CB is a mid, highly saturated blue. Relative luminance 0.083; OKLCH L 45.6% C 0.216 H 275.4°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F39CB
RGB	rgb(63, 57, 203)
HSL	hsl(242, 58%, 51%)
HSV	hsv(242, 72%, 80%)
CMYK	cmyk(69%, 71.9%, 0%, 20.4%)
CIE-LAB	lab(34.59, 47.82, -74.29)
CIE-LCH	lch(34.59, 88.35, 302.77°)
OKLab	oklab(45.65% 0.0204 -0.2147)
OKLCH	oklch(45.65% 0.216 275.4)
XYZ	xyz(14.2890, 8.2935, 57.3361)
Luminance	0.0829 (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

#3F39CB #C5CB39

analogous

#397CCB #3F39CB #8839CB

triadic

#3F39CB #CB3F39 #39CB3F

tetradic

#3F39CB #CB397C #C5CB39 #39CB88

square

#3F39CB #CB397C #C5CB39 #39CB88

split-complementary

#3F39CB #CB8839 #7CCB39

monochromatic

#201D6D #2E299D #3F39CB #6E69D8 #9D9AE4

Accessibility & contrast

On white

7.90

#3F39CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3F39CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39CB

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39CB	#FFFFFF	#000000	##FFFFFF
##3F39CB	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058CF

Deuteranopia (green-blind)

#004BC8

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f39cb;
/* rgb */ color: rgb(63, 57, 203);
/* oklch */ color: oklch(45.6% 0.216 275.4);

Tailwind

colors: {
  custom: {
    50: '#8771dc',
    500: '#3f39cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f39cb;
$custom-light: #8771dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39cb",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 203
  },
  "hsl": {
    "h": 242.466,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.45647,
    "c": 0.21569,
    "h": 275.4
  },
  "luminance": 0.08295
}

Semantic roles & 50–950 ramp

primary

#3F39CB

secondary

#CED090

accent

#E246DB

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3F39CB

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

Preview Lab → · Contrast checker → · Palette generator →