#3F75CD#3F75CD

#3F75CD is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.0% C 0.148 H 259.7°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F75CD
RGB	rgb(63, 117, 205)
HSL	hsl(217, 59%, 53%)
HSV	hsv(217, 69%, 80%)
CMYK	cmyk(69.3%, 42.9%, 0%, 19.6%)
CIE-LAB	lab(49.72, 11.25, -50.87)
CIE-LCH	lch(49.72, 52.10, 282.47°)
OKLab	oklab(57% -0.0264 -0.1454)
OKLCH	oklch(57% 0.148 259.7)
XYZ	xyz(19.4267, 18.1851, 60.2320)
Luminance	0.1819 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75CD #CD973F

analogous

#3FBCCD #3F75CD #503FCD

triadic

#3F75CD #CD3F75 #75CD3F

tetradic

#3F75CD #CD3FBC #CD973F #3FCD50

square

#3F75CD #CD3FBC #CD973F #3FCD50

split-complementary

#3F75CD #CD503F #BCCD3F

monochromatic

#1E3F74 #2B59A4 #3F75CD #7098DA #A0BBE6

Accessibility & contrast

On white

4.53

#3F75CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#3F75CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75CD

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75CD	#FFFFFF	#000000	##000000
##3F75CD	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7DD0

Deuteranopia (green-blind)

#3270CB

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f75cd;
/* rgb */ color: rgb(63, 117, 205);
/* oklch */ color: oklch(57.0% 0.148 259.7);

Tailwind

colors: {
  custom: {
    50: '#849cdd',
    500: '#3f75cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f75cd;
$custom-light: #849cdd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75cd",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 205
  },
  "hsl": {
    "h": 217.183,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.56998,
    "c": 0.14775,
    "h": 259.7
  },
  "luminance": 0.18187
}

Semantic roles & 50–950 ramp

primary

#3F75CD

secondary

#D3BB95

accent

#A746E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75CD

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

Preview Lab → · Contrast checker → · Palette generator →