#3F75D2#3F75D2

#3F75D2 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.3% C 0.154 H 260.5°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F75D2
RGB	rgb(63, 117, 210)
HSL	hsl(218, 62%, 54%)
HSV	hsv(218, 70%, 82%)
CMYK	cmyk(70%, 44.3%, 0%, 17.6%)
CIE-LAB	lab(50.01, 13.05, -53.25)
CIE-LCH	lch(50.01, 54.82, 283.77°)
OKLab	oklab(57.32% -0.0255 -0.1523)
OKLCH	oklch(57.32% 0.154 260.5)
XYZ	xyz(20.0399, 18.4304, 63.4616)
Luminance	0.1843 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75D2 #D29C3F

analogous

#3FBED2 #3F75D2 #523FD2

triadic

#3F75D2 #D23F75 #75D23F

tetradic

#3F75D2 #D23FBE #D29C3F #3FD252

square

#3F75D2 #D23FBE #D29C3F #3FD252

split-complementary

#3F75D2 #D2523F #BED23F

monochromatic

#1D3F7A #2858AC #3F75D2 #7199DE #A2BCE9

Accessibility & contrast

On white

4.48

#3F75D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3F75D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75D2

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75D2	#FFFFFF	#000000	##000000
##3F75D2	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#477ED6

Deuteranopia (green-blind)

#2B71D0

Tritanopia (blue-blind)

#008B99

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f75d2;
/* rgb */ color: rgb(63, 117, 210);
/* oklch */ color: oklch(57.3% 0.154 260.5);

Tailwind

colors: {
  custom: {
    50: '#859ce0',
    500: '#3f75d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f75d2;
$custom-light: #859ce0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75d2",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 210
  },
  "hsl": {
    "h": 217.959,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.5732,
    "c": 0.15446,
    "h": 260.5
  },
  "luminance": 0.18432
}

Semantic roles & 50–950 ramp

primary

#3F75D2

secondary

#D6BF97

accent

#A943E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75D2

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

Preview Lab → · Contrast checker → · Palette generator →