#3F66DA#3F66DA

#3F66DA is a mid, vivid blue. Relative luminance 0.156; OKLCH L 54.8% C 0.183 H 266.3°. Best body text is #FFFFFF at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#3F66DA
RGB	rgb(63, 102, 218)
HSL	hsl(225, 68%, 55%)
HSV	hsv(225, 71%, 85%)
CMYK	cmyk(71.1%, 53.2%, 0%, 14.5%)
CIE-LAB	lab(46.47, 25.38, -63.50)
CIE-LCH	lch(46.47, 68.39, 291.79°)
OKLab	oklab(54.78% -0.0117 -0.1828)
OKLCH	oklch(54.78% 0.183 266.3)
XYZ	xyz(19.4517, 15.6194, 68.3058)
Luminance	0.1562 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F66DA #DAB33F

analogous

#3FB4DA #3F66DA #653FDA

triadic

#3F66DA #DA3F66 #66DA3F

tetradic

#3F66DA #DA3FB4 #DAB33F #3FDA65

square

#3F66DA #DA3FB4 #DAB33F #3FDA65

split-complementary

#3F66DA #DA653F #B4DA3F

monochromatic

#1A3585 #2449B8 #3F66DA #728FE4 #A6B8EE

Accessibility & contrast

On white

5.09

#3F66DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.12

#3F66DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F66DA

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F66DA	#FFFFFF	#000000	##FFFFFF
##3F66DA	1.00	5.09	4.12	5.09
#FFFFFF	5.09	1.00	21.00	1.00
#000000	4.12	21.00	1.00	21.00
##FFFFFF	5.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C76DE

Deuteranopia (green-blind)

#0067D8

Tritanopia (blue-blind)

#008296

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3f66da;
/* rgb */ color: rgb(63, 102, 218);
/* oklch */ color: oklch(54.8% 0.183 266.3);

Tailwind

colors: {
  custom: {
    50: '#8791e6',
    500: '#3f66da',
    950: '#000000',
  },
}

SCSS

$custom: #3f66da;
$custom-light: #8791e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f66da",
  "rgb": {
    "r": 63,
    "g": 102,
    "b": 218
  },
  "hsl": {
    "h": 224.903,
    "s": 67.686,
    "l": 55.098
  },
  "oklch": {
    "l": 0.5478,
    "c": 0.18313,
    "h": 266.3
  },
  "luminance": 0.15621
}

Semantic roles & 50–950 ramp

primary

#3F66DA

secondary

#DBCB9A

accent

#BF3DEB

background

#F9F8FE

surface

#F1F0FC

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F66DA

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

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