#3F5FCF#3F5FCF

#3F5FCF is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.6% C 0.177 H 267.8°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FCF
RGB	rgb(63, 95, 207)
HSL	hsl(227, 60%, 53%)
HSV	hsv(227, 70%, 81%)
CMYK	cmyk(69.6%, 54.1%, 0%, 18.8%)
CIE-LAB	lab(43.86, 25.87, -61.44)
CIE-LCH	lch(43.86, 66.67, 292.84°)
OKLab	oklab(52.57% -0.0068 -0.1768)
OKLCH	oklch(52.57% 0.177 267.8)
XYZ	xyz(17.4007, 13.7444, 60.7553)
Luminance	0.1375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FCF #CFAF3F

analogous

#3FA7CF #3F5FCF #673FCF

triadic

#3F5FCF #CF3F5F #5FCF3F

tetradic

#3F5FCF #CF3FA7 #CFAF3F #3FCF67

square

#3F5FCF #CF3FA7 #CFAF3F #3FCF67

split-complementary

#3F5FCF #CF673F #A7CF3F

monochromatic

#1E3176 #2A46A7 #3F5FCF #7088DB #A1B1E7

Accessibility & contrast

On white

5.60

#3F5FCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#3F5FCF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FCF

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FCF	#FFFFFF	#000000	##FFFFFF
##3F5FCF	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#016FD3

Deuteranopia (green-blind)

#0061CD

Tritanopia (blue-blind)

#007A8E

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f5fcf;
/* rgb */ color: rgb(63, 95, 207);
/* oklch */ color: oklch(52.6% 0.177 267.8);

Tailwind

colors: {
  custom: {
    50: '#858cde',
    500: '#3f5fcf',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fcf;
$custom-light: #858cde;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fcf",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 207
  },
  "hsl": {
    "h": 226.667,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.52567,
    "c": 0.17693,
    "h": 267.8
  },
  "luminance": 0.13746
}

Semantic roles & 50–950 ramp

primary

#3F5FCF

secondary

#D4C696

accent

#C045E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F5FCF

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

Preview Lab → · Contrast checker → · Palette generator →