#3F55C4#3F55C4

#3F55C4 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.8% C 0.174 H 270.3°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F55C4
RGB	rgb(63, 85, 196)
HSL	hsl(230, 53%, 51%)
HSV	hsv(230, 68%, 77%)
CMYK	cmyk(67.9%, 56.6%, 0%, 23.1%)
CIE-LAB	lab(40.47, 28.33, -60.59)
CIE-LCH	lch(40.47, 66.89, 295.06°)
OKLab	oklab(49.77% 0.001 -0.1744)
OKLCH	oklch(49.77% 0.174 270.3)
XYZ	xyz(15.2588, 11.5378, 53.6367)
Luminance	0.1154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55C4 #C4AE3F

analogous

#3F97C4 #3F55C4 #6B3FC4

triadic

#3F55C4 #C43F55 #55C43F

tetradic

#3F55C4 #C43F97 #C4AE3F #3FC46B

square

#3F55C4 #C43F97 #C4AE3F #3FC46B

split-complementary

#3F55C4 #C46B3F #97C43F

monochromatic

#202C68 #2E4097 #3F55C4 #6E7ED2 #9DA8E1

Accessibility & contrast

On white

6.35

#3F55C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#3F55C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55C4

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55C4	#FFFFFF	#000000	##FFFFFF
##3F55C4	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066C8

Deuteranopia (green-blind)

#005AC2

Tritanopia (blue-blind)

#007084

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f55c4;
/* rgb */ color: rgb(63, 85, 196);
/* oklch */ color: oklch(49.8% 0.174 270.3);

Tailwind

colors: {
  custom: {
    50: '#8484d7',
    500: '#3f55c4',
    950: '#000000',
  },
}

SCSS

$custom: #3f55c4;
$custom-light: #8484d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55c4",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 196
  },
  "hsl": {
    "h": 230.075,
    "s": 52.988,
    "l": 50.784
  },
  "oklch": {
    "l": 0.49768,
    "c": 0.17443,
    "h": 270.3
  },
  "luminance": 0.11539
}

Semantic roles & 50–950 ramp

primary

#3F55C4

secondary

#CDC392

accent

#C44BDC

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F55C4

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

Preview Lab → · Contrast checker → · Palette generator →