#3F45C9#3F45C9

#3F45C9 is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.3% C 0.200 H 273.8°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#3F45C9
RGB	rgb(63, 69, 201)
HSL	hsl(237, 56%, 52%)
HSV	hsv(237, 69%, 79%)
CMYK	cmyk(68.7%, 65.7%, 0%, 21.2%)
CIE-LAB	lab(36.98, 40.12, -69.19)
CIE-LCH	lch(36.98, 79.98, 300.11°)
OKLab	oklab(47.32% 0.0131 -0.1998)
OKLCH	oklch(47.32% 0.2 273.8)
XYZ	xyz(14.7171, 9.5287, 56.3106)
Luminance	0.0953 (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

#3F45C9 #C9C33F

analogous

#3F8AC9 #3F45C9 #7E3FC9

triadic

#3F45C9 #C93F45 #45C93F

tetradic

#3F45C9 #C93F8A #C9C33F #3FC97E

square

#3F45C9 #C93F8A #C9C33F #3FC97E

split-complementary

#3F45C9 #C97E3F #8AC93F

monochromatic

#1F236F #2D319E #3F45C9 #6F73D6 #9FA2E4

Accessibility & contrast

On white

7.23

#3F45C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3F45C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45C9

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45C9	#FFFFFF	#000000	##FFFFFF
##3F45C9	1.00	7.23	2.91	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCD

Deuteranopia (green-blind)

#0051C6

Tritanopia (blue-blind)

#006881

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f45c9;
/* rgb */ color: rgb(63, 69, 201);
/* oklch */ color: oklch(47.3% 0.200 273.8);

Tailwind

colors: {
  custom: {
    50: '#8679db',
    500: '#3f45c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f45c9;
$custom-light: #8679db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45c9",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 201
  },
  "hsl": {
    "h": 237.391,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.47318,
    "c": 0.20024,
    "h": 273.8
  },
  "luminance": 0.0953
}

Semantic roles & 50–950 ramp

primary

#3F45C9

secondary

#D0CE94

accent

#D948DF

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F45C9

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

Preview Lab → · Contrast checker → · Palette generator →