#3F55C5#3F55C5

#3F55C5 is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.8% C 0.176 H 270.3°. Best body text is #FFFFFF at 6.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F55C5
RGB	rgb(63, 85, 197)
HSL	hsl(230, 54%, 51%)
HSV	hsv(230, 68%, 77%)
CMYK	cmyk(68%, 56.9%, 0%, 22.7%)
CIE-LAB	lab(40.55, 28.69, -61.05)
CIE-LCH	lch(40.55, 67.45, 295.17°)
OKLab	oklab(49.85% 0.001 -0.1758)
OKLCH	oklch(49.85% 0.176 270.3)
XYZ	xyz(15.3730, 11.5835, 54.2382)
Luminance	0.1158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55C5 #C5AF3F

analogous

#3F98C5 #3F55C5 #6C3FC5

triadic

#3F55C5 #C53F55 #55C53F

tetradic

#3F55C5 #C53F98 #C5AF3F #3FC56C

square

#3F55C5 #C53F98 #C5AF3F #3FC56C

split-complementary

#3F55C5 #C56C3F #98C53F

monochromatic

#202C6A #2E4099 #3F55C5 #6E7FD3 #9DA8E1

Accessibility & contrast

On white

6.33

#3F55C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#3F55C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55C5

6.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55C5	#FFFFFF	#000000	##FFFFFF
##3F55C5	1.00	6.33	3.32	6.33
#FFFFFF	6.33	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066C9

Deuteranopia (green-blind)

#005AC3

Tritanopia (blue-blind)

#007085

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f55c5;
/* rgb */ color: rgb(63, 85, 197);
/* oklch */ color: oklch(49.8% 0.176 270.3);

Tailwind

colors: {
  custom: {
    50: '#8484d7',
    500: '#3f55c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f55c5;
$custom-light: #8484d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55c5",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 197
  },
  "hsl": {
    "h": 230.149,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.49847,
    "c": 0.17579,
    "h": 270.3
  },
  "luminance": 0.11585
}

Semantic roles & 50–950 ramp

primary

#3F55C5

secondary

#CEC492

accent

#C54BDD

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F55C5

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

Preview Lab → · Contrast checker → · Palette generator →