#3F65BC#3F65BC

#3F65BC is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.4% C 0.143 H 264.3°. Best body text is #FFFFFF at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#3F65BC
RGB	rgb(63, 101, 188)
HSL	hsl(222, 50%, 49%)
HSV	hsv(222, 66%, 74%)
CMYK	cmyk(66.5%, 46.3%, 0%, 26.3%)
CIE-LAB	lab(44.22, 15.21, -49.89)
CIE-LCH	lch(44.22, 52.15, 286.95°)
OKLab	oklab(52.44% -0.0143 -0.1427)
OKLCH	oklch(52.44% 0.143 264.3)
XYZ	xyz(15.7775, 13.9934, 49.4367)
Luminance	0.1399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65BC #BC963F

analogous

#3FA4BC #3F65BC #583FBC

triadic

#3F65BC #BC3F65 #65BC3F

tetradic

#3F65BC #BC3FA4 #BC963F #3FBC58

square

#3F65BC #BC3FA4 #BC963F #3FBC58

split-complementary

#3F65BC #BC583F #A4BC3F

monochromatic

#203460 #304C8E #3F65BC #6B89CD #99ADDD

Accessibility & contrast

On white

5.53

#3F65BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#3F65BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65BC

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65BC	#FFFFFF	#000000	##FFFFFF
##3F65BC	1.00	5.53	3.80	5.53
#FFFFFF	5.53	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396FBF

Deuteranopia (green-blind)

#2263BA

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3f65bc;
/* rgb */ color: rgb(63, 101, 188);
/* oklch */ color: oklch(52.4% 0.143 264.3);

Tailwind

colors: {
  custom: {
    50: '#8190d1',
    500: '#3f65bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f65bc;
$custom-light: #8190d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65bc",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 188
  },
  "hsl": {
    "h": 221.76,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.52437,
    "c": 0.14342,
    "h": 264.3
  },
  "luminance": 0.13995
}

Semantic roles & 50–950 ramp

primary

#3F65BC

secondary

#C9B78E

accent

#AF4ED9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F65BC

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

Preview Lab → · Contrast checker → · Palette generator →