#3F6FE9#3F6FE9

#3F6FE9 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.7% C 0.192 H 264.8°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FE9
RGB	rgb(63, 111, 233)
HSL	hsl(223, 79%, 58%)
HSV	hsv(223, 73%, 91%)
CMYK	cmyk(73%, 52.4%, 0%, 8.6%)
CIE-LAB	lab(49.87, 25.11, -66.48)
CIE-LCH	lch(49.87, 71.06, 290.69°)
OKLab	oklab(57.68% -0.0174 -0.1914)
OKLCH	oklch(57.68% 0.192 264.8)
XYZ	xyz(22.4371, 18.3064, 79.4260)
Luminance	0.1831 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FE9 #E9B93F

analogous

#3FC4E9 #3F6FE9 #643FE9

triadic

#3F6FE9 #E93F6F #6FE93F

tetradic

#3F6FE9 #E93FC4 #E9B93F #3FE964

square

#3F6FE9 #E93FC4 #E9B93F #3FE964

split-complementary

#3F6FE9 #E9643F #C4E93F

monochromatic

#12399C #184DD3 #3F6FE9 #7698EF #ADC1F6

Accessibility & contrast

On white

4.50

#3F6FE9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3F6FE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F6FE9

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FE9	#FFFFFF	#000000	##000000
##3F6FE9	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#167FED

Deuteranopia (green-blind)

#006FE7

Tritanopia (blue-blind)

#008DA1

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f6fe9;
/* rgb */ color: rgb(63, 111, 233);
/* oklch */ color: oklch(57.7% 0.192 264.8);

Tailwind

colors: {
  custom: {
    50: '#8a97f1',
    500: '#3f6fe9',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fe9;
$custom-light: #8a97f1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fe9",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 233
  },
  "hsl": {
    "h": 223.059,
    "s": 79.439,
    "l": 58.039
  },
  "oklch": {
    "l": 0.57677,
    "c": 0.19216,
    "h": 264.8
  },
  "luminance": 0.18309
}

Semantic roles & 50–950 ramp

primary

#3F6FE9

secondary

#E4D1A0

accent

#BF32F6

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0D17

muted

#7E7E85

Preview Lab

Preview with #3F6FE9

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

Preview Lab → · Contrast checker → · Palette generator →