#3F75CE#3F75CE

#3F75CE is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.1% C 0.149 H 259.9°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F75CE
RGB	rgb(63, 117, 206)
HSL	hsl(217, 59%, 53%)
HSV	hsv(217, 69%, 81%)
CMYK	cmyk(69.4%, 43.2%, 0%, 19.2%)
CIE-LAB	lab(49.78, 11.61, -51.35)
CIE-LCH	lch(49.78, 52.64, 282.74°)
OKLab	oklab(57.06% -0.0262 -0.1468)
OKLCH	oklch(57.06% 0.149 259.9)
XYZ	xyz(19.5478, 18.2335, 60.8698)
Luminance	0.1824 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75CE #CE983F

analogous

#3FBCCE #3F75CE #513FCE

triadic

#3F75CE #CE3F75 #75CE3F

tetradic

#3F75CE #CE3FBC #CE983F #3FCE51

square

#3F75CE #CE3FBC #CE983F #3FCE51

split-complementary

#3F75CE #CE513F #BCCE3F

monochromatic

#1E3F75 #2A59A6 #3F75CE #7098DA #A1BBE7

Accessibility & contrast

On white

4.52

#3F75CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#3F75CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75CE

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75CE	#FFFFFF	#000000	##000000
##3F75CE	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7DD1

Deuteranopia (green-blind)

#3170CC

Tritanopia (blue-blind)

#008A97

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f75ce;
/* rgb */ color: rgb(63, 117, 206);
/* oklch */ color: oklch(57.1% 0.149 259.9);

Tailwind

colors: {
  custom: {
    50: '#849cdd',
    500: '#3f75ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f75ce;
$custom-light: #849cdd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75ce",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 206
  },
  "hsl": {
    "h": 217.343,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.57061,
    "c": 0.14909,
    "h": 259.9
  },
  "luminance": 0.18236
}

Semantic roles & 50–950 ramp

primary

#3F75CE

secondary

#D3BC95

accent

#A745E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75CE

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

Preview Lab → · Contrast checker → · Palette generator →