#3F55C8#3F55C8

#3F55C8 is a mid, vivid blue. Relative luminance 0.117; OKLCH L 50.1% C 0.180 H 270.3°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#3F55C8
RGB	rgb(63, 85, 200)
HSL	hsl(230, 55%, 52%)
HSV	hsv(230, 69%, 78%)
CMYK	cmyk(68.5%, 57.5%, 0%, 21.6%)
CIE-LAB	lab(40.77, 29.75, -62.42)
CIE-LCH	lch(40.77, 69.15, 295.49°)
OKLab	oklab(50.09% 0.0011 -0.1798)
OKLCH	oklch(50.09% 0.18 270.3)
XYZ	xyz(15.7202, 11.7224, 56.0666)
Luminance	0.1172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55C8 #C8B23F

analogous

#3F9AC8 #3F55C8 #6E3FC8

triadic

#3F55C8 #C83F55 #55C83F

tetradic

#3F55C8 #C83F9A #C8B23F #3FC86E

square

#3F55C8 #C83F9A #C8B23F #3FC86E

split-complementary

#3F55C8 #C86E3F #9AC83F

monochromatic

#1F2C6D #2D3F9D #3F55C8 #6F7FD6 #9EA9E3

Accessibility & contrast

On white

6.28

#3F55C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#3F55C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55C8

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55C8	#FFFFFF	#000000	##FFFFFF
##3F55C8	1.00	6.28	3.34	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067CC

Deuteranopia (green-blind)

#005AC6

Tritanopia (blue-blind)

#007186

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f55c8;
/* rgb */ color: rgb(63, 85, 200);
/* oklch */ color: oklch(50.1% 0.180 270.3);

Tailwind

colors: {
  custom: {
    50: '#8484da',
    500: '#3f55c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f55c8;
$custom-light: #8484da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55c8",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 200
  },
  "hsl": {
    "h": 230.365,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.50086,
    "c": 0.17982,
    "h": 270.3
  },
  "luminance": 0.11724
}

Semantic roles & 50–950 ramp

primary

#3F55C8

secondary

#D0C693

accent

#C749DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F55C8

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

Preview Lab → · Contrast checker → · Palette generator →