#3F45D0#3F45D0

#3F45D0 is a mid, highly saturated blue. Relative luminance 0.099; OKLCH L 48.0% C 0.209 H 273.4°. Best body text is #FFFFFF at 7.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F45D0
RGB	rgb(63, 69, 208)
HSL	hsl(238, 61%, 53%)
HSV	hsv(238, 70%, 82%)
CMYK	cmyk(69.7%, 66.8%, 0%, 18.4%)
CIE-LAB	lab(37.60, 42.48, -72.23)
CIE-LCH	lch(37.60, 83.80, 300.46°)
OKLab	oklab(47.96% 0.0124 -0.2087)
OKLCH	oklch(47.96% 0.209 273.4)
XYZ	xyz(15.5594, 9.8656, 60.7465)
Luminance	0.0987 (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

#3F45D0 #D0CA3F

analogous

#3F8DD0 #3F45D0 #813FD0

triadic

#3F45D0 #D03F45 #45D03F

tetradic

#3F45D0 #D03F8D #D0CA3F #3FD081

square

#3F45D0 #D03F8D #D0CA3F #3FD081

split-complementary

#3F45D0 #D0813F #8DD03F

monochromatic

#1D2177 #292FA9 #3F45D0 #7075DC #A1A4E8

Accessibility & contrast

On white

7.06

#3F45D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F45D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45D0

7.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45D0	#FFFFFF	#000000	##FFFFFF
##3F45D0	1.00	7.06	2.97	7.06
#FFFFFF	7.06	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD4

Deuteranopia (green-blind)

#0052CD

Tritanopia (blue-blind)

#006A85

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f45d0;
/* rgb */ color: rgb(63, 69, 208);
/* oklch */ color: oklch(48.0% 0.209 273.4);

Tailwind

colors: {
  custom: {
    50: '#8779e0',
    500: '#3f45d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f45d0;
$custom-light: #8779e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45d0",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 208
  },
  "hsl": {
    "h": 237.517,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.47955,
    "c": 0.20909,
    "h": 273.4
  },
  "luminance": 0.09867
}

Semantic roles & 50–950 ramp

primary

#3F45D0

secondary

#D5D296

accent

#DD44E4

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F45D0

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

Preview Lab → · Contrast checker → · Palette generator →