#3F45E4#3F45E4

#3F45E4 is a mid, highly saturated blue. Relative luminance 0.109; OKLCH L 49.8% C 0.234 H 272.5°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F45E4
RGB	rgb(63, 69, 228)
HSL	hsl(238, 75%, 57%)
HSV	hsv(238, 72%, 89%)
CMYK	cmyk(72.4%, 69.7%, 0%, 10.6%)
CIE-LAB	lab(39.43, 49.13, -80.69)
CIE-LCH	lch(39.43, 94.47, 301.34°)
OKLab	oklab(49.83% 0.0101 -0.2334)
OKLCH	oklch(49.83% 0.234 272.5)
XYZ	xyz(18.1769, 10.9126, 74.5321)
Luminance	0.1091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 4.98

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F45E4 #E4DE3F

analogous

#3F98E4 #3F45E4 #8C3FE4

triadic

#3F45E4 #E43F45 #45E43F

tetradic

#3F45E4 #E43F98 #E4DE3F #3FE48C

square

#3F45E4 #E43F98 #E4DE3F #3FE48C

split-complementary

#3F45E4 #E48C3F #98E43F

monochromatic

#151994 #1C23C9 #3F45E4 #7579EC #AAADF3

Accessibility & contrast

On white

6.60

#3F45E4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3F45E4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F45E4

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45E4	#FFFFFF	#000000	##FFFFFF
##3F45E4	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065E9

Deuteranopia (green-blind)

#0055E1

Tritanopia (blue-blind)

#007190

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f45e4;
/* rgb */ color: rgb(63, 69, 228);
/* oklch */ color: oklch(49.8% 0.234 272.5);

Tailwind

colors: {
  custom: {
    50: '#8c7aee',
    500: '#3f45e4',
    950: '#000000',
  },
}

SCSS

$custom: #3f45e4;
$custom-light: #8c7aee;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45e4",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 228
  },
  "hsl": {
    "h": 237.818,
    "s": 75.342,
    "l": 57.059
  },
  "oklch": {
    "l": 0.49834,
    "c": 0.23365,
    "h": 272.5
  },
  "luminance": 0.10914
}

Semantic roles & 50–950 ramp

primary

#3F45E4

secondary

#E1DF9E

accent

#EB36F2

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0917

muted

#7E7B85

Preview Lab

Preview with #3F45E4

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

Preview Lab → · Contrast checker → · Palette generator →