#3F43D0#3F43D0

#3F43D0 is a mid, highly saturated blue. Relative luminance 0.096; OKLCH L 47.6% C 0.211 H 273.7°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F43D0
RGB	rgb(63, 67, 208)
HSL	hsl(238, 61%, 53%)
HSV	hsv(238, 70%, 82%)
CMYK	cmyk(69.7%, 67.8%, 0%, 18.4%)
CIE-LAB	lab(37.16, 43.68, -72.96)
CIE-LCH	lch(37.16, 85.03, 300.91°)
OKLab	oklab(47.64% 0.0137 -0.2108)
OKLCH	oklch(47.64% 0.211 273.7)
XYZ	xyz(15.4384, 9.6237, 60.7062)
Luminance	0.0963 (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

#3F43D0 #D0CC3F

analogous

#3F8BD0 #3F43D0 #833FD0

triadic

#3F43D0 #D03F43 #43D03F

tetradic

#3F43D0 #D03F8B #D0CC3F #3FD083

square

#3F43D0 #D03F8B #D0CC3F #3FD083

split-complementary

#3F43D0 #D0833F #8BD03F

monochromatic

#1D2077 #292DA9 #3F43D0 #7073DC #A1A3E8

Accessibility & contrast

On white

7.18

#3F43D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#3F43D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43D0

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43D0	#FFFFFF	#000000	##FFFFFF
##3F43D0	1.00	7.18	2.93	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED4

Deuteranopia (green-blind)

#0051CD

Tritanopia (blue-blind)

#006984

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f43d0;
/* rgb */ color: rgb(63, 67, 208);
/* oklch */ color: oklch(47.6% 0.211 273.7);

Tailwind

colors: {
  custom: {
    50: '#8778e0',
    500: '#3f43d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f43d0;
$custom-light: #8778e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43d0",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 208
  },
  "hsl": {
    "h": 238.345,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.47636,
    "c": 0.21129,
    "h": 273.7
  },
  "luminance": 0.09625
}

Semantic roles & 50–950 ramp

primary

#3F43D0

secondary

#D5D396

accent

#DF44E4

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F43D0

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

Preview Lab → · Contrast checker → · Palette generator →