#3F38CB#3F38CB

#3F38CB is a mid, highly saturated blue. Relative luminance 0.082; OKLCH L 45.5% C 0.217 H 275.6°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F38CB
RGB	rgb(63, 56, 203)
HSL	hsl(243, 59%, 51%)
HSV	hsv(243, 72%, 80%)
CMYK	cmyk(69%, 72.4%, 0%, 20.4%)
CIE-LAB	lab(34.39, 48.37, -74.62)
CIE-LCH	lch(34.39, 88.92, 302.96°)
OKLab	oklab(45.51% 0.021 -0.2157)
OKLCH	oklch(45.51% 0.217 275.6)
XYZ	xyz(14.2400, 8.1956, 57.3198)
Luminance	0.0820 (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

#3F38CB #C4CB38

analogous

#387ACB #3F38CB #8838CB

triadic

#3F38CB #CB3F38 #38CB3F

tetradic

#3F38CB #CB387A #C4CB38 #38CB88

square

#3F38CB #CB387A #C4CB38 #38CB88

split-complementary

#3F38CB #CB8838 #7ACB38

monochromatic

#201C6C #2E299D #3F38CB #6E69D8 #9D99E4

Accessibility & contrast

On white

7.96

#3F38CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3F38CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F38CB

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F38CB	#FFFFFF	#000000	##FFFFFF
##3F38CB	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057CF

Deuteranopia (green-blind)

#004AC8

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f38cb;
/* rgb */ color: rgb(63, 56, 203);
/* oklch */ color: oklch(45.5% 0.217 275.6);

Tailwind

colors: {
  custom: {
    50: '#8770dc',
    500: '#3f38cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f38cb;
$custom-light: #8770dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f38cb",
  "rgb": {
    "r": 63,
    "g": 56,
    "b": 203
  },
  "hsl": {
    "h": 242.857,
    "s": 58.566,
    "l": 50.784
  },
  "oklch": {
    "l": 0.45505,
    "c": 0.21669,
    "h": 275.6
  },
  "luminance": 0.08197
}

Semantic roles & 50–950 ramp

primary

#3F38CB

secondary

#CDD08F

accent

#E246DA

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3F38CB

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

Preview Lab → · Contrast checker → · Palette generator →