#3F65C8#3F65C8

#3F65C8 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.3% C 0.160 H 265.5°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#3F65C8
RGB	rgb(63, 101, 200)
HSL	hsl(223, 55%, 52%)
HSV	hsv(223, 69%, 78%)
CMYK	cmyk(68.5%, 49.5%, 0%, 21.6%)
CIE-LAB	lab(44.99, 19.53, -55.60)
CIE-LCH	lch(44.99, 58.93, 289.35°)
OKLab	oklab(53.27% -0.0126 -0.1595)
OKLCH	oklch(53.27% 0.16 265.5)
XYZ	xyz(17.1253, 14.5325, 56.5349)
Luminance	0.1453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65C8 #C8A23F

analogous

#3FAAC8 #3F65C8 #5E3FC8

triadic

#3F65C8 #C83F65 #65C83F

tetradic

#3F65C8 #C83FAA #C8A23F #3FC85E

square

#3F65C8 #C83FAA #C8A23F #3FC85E

split-complementary

#3F65C8 #C85E3F #AAC83F

monochromatic

#1F356D #2D4C9D #3F65C8 #6F8BD6 #9EB1E3

Accessibility & contrast

On white

5.38

#3F65C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#3F65C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65C8

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65C8	#FFFFFF	#000000	##FFFFFF
##3F65C8	1.00	5.38	3.91	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D71CC

Deuteranopia (green-blind)

#0065C6

Tritanopia (blue-blind)

#007C8D

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f65c8;
/* rgb */ color: rgb(63, 101, 200);
/* oklch */ color: oklch(53.3% 0.160 265.5);

Tailwind

colors: {
  custom: {
    50: '#8490d9',
    500: '#3f65c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f65c8;
$custom-light: #8490d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65c8",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 200
  },
  "hsl": {
    "h": 223.358,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.53266,
    "c": 0.16002,
    "h": 265.5
  },
  "luminance": 0.14534
}

Semantic roles & 50–950 ramp

primary

#3F65C8

secondary

#D0BF93

accent

#B549DF

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F65C8

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

Preview Lab → · Contrast checker → · Palette generator →