#3F75D1#3F75D1

#3F75D1 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.3% C 0.153 H 260.3°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F75D1
RGB	rgb(63, 117, 209)
HSL	hsl(218, 61%, 53%)
HSV	hsv(218, 70%, 82%)
CMYK	cmyk(69.9%, 44%, 0%, 18%)
CIE-LAB	lab(49.95, 12.69, -52.77)
CIE-LCH	lch(49.95, 54.28, 283.52°)
OKLab	oklab(57.26% -0.0257 -0.1509)
OKLCH	oklch(57.26% 0.153 260.3)
XYZ	xyz(19.9157, 18.3807, 62.8075)
Luminance	0.1838 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75D1 #D19B3F

analogous

#3FBED1 #3F75D1 #523FD1

triadic

#3F75D1 #D13F75 #75D13F

tetradic

#3F75D1 #D13FBE #D19B3F #3FD152

square

#3F75D1 #D13FBE #D19B3F #3FD152

split-complementary

#3F75D1 #D1523F #BED13F

monochromatic

#1D3F79 #2959AA #3F75D1 #7098DD #A2BCE9

Accessibility & contrast

On white

4.49

#3F75D1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#3F75D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75D1

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75D1	#FFFFFF	#000000	##000000
##3F75D1	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#487ED5

Deuteranopia (green-blind)

#2D71CF

Tritanopia (blue-blind)

#008A99

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f75d1;
/* rgb */ color: rgb(63, 117, 209);
/* oklch */ color: oklch(57.3% 0.153 260.3);

Tailwind

colors: {
  custom: {
    50: '#859ce0',
    500: '#3f75d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f75d1;
$custom-light: #859ce0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75d1",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 209
  },
  "hsl": {
    "h": 217.808,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.57255,
    "c": 0.15312,
    "h": 260.3
  },
  "luminance": 0.18383
}

Semantic roles & 50–950 ramp

primary

#3F75D1

secondary

#D5BE97

accent

#A943E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75D1

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

Preview Lab → · Contrast checker → · Palette generator →