#3F75CF#3F75CF

#3F75CF is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.1% C 0.150 H 260.0°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F75CF
RGB	rgb(63, 117, 207)
HSL	hsl(218, 60%, 53%)
HSV	hsv(218, 70%, 81%)
CMYK	cmyk(69.6%, 43.5%, 0%, 18.8%)
CIE-LAB	lab(49.84, 11.97, -51.82)
CIE-LCH	lch(49.84, 53.19, 283.01°)
OKLab	oklab(57.13% -0.0261 -0.1482)
OKLCH	oklch(57.13% 0.15 260)
XYZ	xyz(19.6696, 18.2823, 61.5116)
Luminance	0.1828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75CF #CF993F

analogous

#3FBDCF #3F75CF #513FCF

triadic

#3F75CF #CF3F75 #75CF3F

tetradic

#3F75CF #CF3FBD #CF993F #3FCF51

square

#3F75CF #CF3FBD #CF993F #3FCF51

split-complementary

#3F75CF #CF513F #BDCF3F

monochromatic

#1E3F76 #2A59A7 #3F75CF #7098DB #A1BBE7

Accessibility & contrast

On white

4.51

#3F75CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3F75CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75CF

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75CF	#FFFFFF	#000000	##000000
##3F75CF	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#497ED2

Deuteranopia (green-blind)

#3070CD

Tritanopia (blue-blind)

#008A98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f75cf;
/* rgb */ color: rgb(63, 117, 207);
/* oklch */ color: oklch(57.1% 0.150 260.0);

Tailwind

colors: {
  custom: {
    50: '#849cde',
    500: '#3f75cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f75cf;
$custom-light: #849cde;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75cf",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 207
  },
  "hsl": {
    "h": 217.5,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.57126,
    "c": 0.15043,
    "h": 260
  },
  "luminance": 0.18284
}

Semantic roles & 50–950 ramp

primary

#3F75CF

secondary

#D4BD96

accent

#A845E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75CF

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

Preview Lab → · Contrast checker → · Palette generator →