#3F45CC#3F45CC

#3F45CC is a mid, highly saturated blue. Relative luminance 0.097; OKLCH L 47.6% C 0.204 H 273.6°. Best body text is #FFFFFF at 7.16:1 contrast (WCAG AA passes).

Color values

HEX	#3F45CC
RGB	rgb(63, 69, 204)
HSL	hsl(237, 58%, 52%)
HSV	hsv(237, 69%, 80%)
CMYK	cmyk(69.1%, 66.2%, 0%, 20%)
CIE-LAB	lab(37.25, 41.13, -70.50)
CIE-LCH	lch(37.25, 81.62, 300.26°)
OKLab	oklab(47.59% 0.0128 -0.2036)
OKLCH	oklch(47.59% 0.204 273.6)
XYZ	xyz(15.0735, 9.6712, 58.1874)
Luminance	0.0967 (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

#3F45CC #CCC63F

analogous

#3F8BCC #3F45CC #803FCC

triadic

#3F45CC #CC3F45 #45CC3F

tetradic

#3F45CC #CC3F8B #CCC63F #3FCC80

square

#3F45CC #CC3F8B #CCC63F #3FCC80

split-complementary

#3F45CC #CC803F #8BCC3F

monochromatic

#1E2272 #2B30A3 #3F45CC #6F74D9 #A0A3E6

Accessibility & contrast

On white

7.16

#3F45CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#3F45CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45CC

7.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45CC	#FFFFFF	#000000	##FFFFFF
##3F45CC	1.00	7.16	2.93	7.16
#FFFFFF	7.16	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED0

Deuteranopia (green-blind)

#0051C9

Tritanopia (blue-blind)

#006982

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f45cc;
/* rgb */ color: rgb(63, 69, 204);
/* oklch */ color: oklch(47.6% 0.204 273.6);

Tailwind

colors: {
  custom: {
    50: '#8679dd',
    500: '#3f45cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f45cc;
$custom-light: #8679dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45cc",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 204
  },
  "hsl": {
    "h": 237.447,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.4759,
    "c": 0.20405,
    "h": 273.6
  },
  "luminance": 0.09673
}

Semantic roles & 50–950 ramp

primary

#3F45CC

secondary

#D2CF95

accent

#DB47E1

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F45CC

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

Preview Lab → · Contrast checker → · Palette generator →