#3F75CC#3F75CC

#3F75CC is a mid, vivid blue. Relative luminance 0.181; OKLCH L 56.9% C 0.146 H 259.5°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F75CC
RGB	rgb(63, 117, 204)
HSL	hsl(217, 58%, 52%)
HSV	hsv(217, 69%, 80%)
CMYK	cmyk(69.1%, 42.6%, 0%, 20%)
CIE-LAB	lab(49.66, 10.89, -50.39)
CIE-LCH	lch(49.66, 51.56, 282.20°)
OKLab	oklab(56.93% -0.0266 -0.144)
OKLCH	oklch(56.93% 0.146 259.5)
XYZ	xyz(19.3064, 18.1370, 59.5983)
Luminance	0.1814 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75CC #CC963F

analogous

#3FBCCC #3F75CC #4F3FCC

triadic

#3F75CC #CC3F75 #75CC3F

tetradic

#3F75CC #CC3FBC #CC963F #3FCC4F

square

#3F75CC #CC3FBC #CC963F #3FCC4F

split-complementary

#3F75CC #CC4F3F #BCCC3F

monochromatic

#1E3E72 #2B59A3 #3F75CC #6F98D9 #A0BBE6

Accessibility & contrast

On white

4.54

#3F75CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#3F75CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75CC

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75CC	#FFFFFF	#000000	##000000
##3F75CC	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7DCF

Deuteranopia (green-blind)

#3370CA

Tritanopia (blue-blind)

#008996

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f75cc;
/* rgb */ color: rgb(63, 117, 204);
/* oklch */ color: oklch(56.9% 0.146 259.5);

Tailwind

colors: {
  custom: {
    50: '#849cdc',
    500: '#3f75cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f75cc;
$custom-light: #849cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75cc",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 204
  },
  "hsl": {
    "h": 217.021,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56934,
    "c": 0.1464,
    "h": 259.5
  },
  "luminance": 0.18139
}

Semantic roles & 50–950 ramp

primary

#3F75CC

secondary

#D2BB95

accent

#A647E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75CC

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

Preview Lab → · Contrast checker → · Palette generator →