#3F45CE#3F45CE

#3F45CE is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 47.8% C 0.207 H 273.5°. Best body text is #FFFFFF at 7.11:1 contrast (WCAG AA passes).

Color values

HEX	#3F45CE
RGB	rgb(63, 69, 206)
HSL	hsl(237, 59%, 53%)
HSV	hsv(237, 69%, 81%)
CMYK	cmyk(69.4%, 66.5%, 0%, 19.2%)
CIE-LAB	lab(37.42, 41.81, -71.37)
CIE-LCH	lch(37.42, 82.71, 300.36°)
OKLab	oklab(47.77% 0.0126 -0.2062)
OKLCH	oklch(47.77% 0.207 273.5)
XYZ	xyz(15.3149, 9.7678, 59.4588)
Luminance	0.0977 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F45CE #CEC83F

analogous

#3F8CCE #3F45CE #813FCE

triadic

#3F45CE #CE3F45 #45CE3F

tetradic

#3F45CE #CE3F8C #CEC83F #3FCE81

square

#3F45CE #CE3F8C #CEC83F #3FCE81

split-complementary

#3F45CE #CE813F #8CCE3F

monochromatic

#1E2175 #2A2FA6 #3F45CE #7074DA #A1A3E7

Accessibility & contrast

On white

7.11

#3F45CE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#3F45CE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45CE

7.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45CE	#FFFFFF	#000000	##FFFFFF
##3F45CE	1.00	7.11	2.95	7.11
#FFFFFF	7.11	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD2

Deuteranopia (green-blind)

#0051CB

Tritanopia (blue-blind)

#006984

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f45ce;
/* rgb */ color: rgb(63, 69, 206);
/* oklch */ color: oklch(47.8% 0.207 273.5);

Tailwind

colors: {
  custom: {
    50: '#8779de',
    500: '#3f45ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f45ce;
$custom-light: #8779de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45ce",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 206
  },
  "hsl": {
    "h": 237.483,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.47772,
    "c": 0.20658,
    "h": 273.5
  },
  "luminance": 0.09769
}

Semantic roles & 50–950 ramp

primary

#3F45CE

secondary

#D3D195

accent

#DC45E3

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F45CE

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

Preview Lab → · Contrast checker → · Palette generator →