#3A66D9#3A66D9

#3A66D9 is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.5% C 0.183 H 265.0°. Best body text is #FFFFFF at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#3A66D9
RGB	rgb(58, 102, 217)
HSL	hsl(223, 68%, 54%)
HSV	hsv(223, 73%, 85%)
CMYK	cmyk(73.3%, 53%, 0%, 14.9%)
CIE-LAB	lab(46.19, 24.37, -63.40)
CIE-LCH	lch(46.19, 67.92, 291.03°)
OKLab	oklab(54.49% -0.0158 -0.1825)
OKLCH	oklch(54.49% 0.183 265)
XYZ	xyz(19.0163, 15.4100, 67.6044)
Luminance	0.1541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A66D9 #D9AD3A

analogous

#3AB6D9 #3A66D9 #5E3AD9

triadic

#3A66D9 #D93A66 #66D93A

tetradic

#3A66D9 #D93AB6 #D9AD3A #3AD95E

square

#3A66D9 #D93AB6 #D9AD3A #3AD95E

split-complementary

#3A66D9 #D95E3A #B6D93A

monochromatic

#193580 #234BB3 #3A66D9 #6D8EE3 #A1B6ED

Accessibility & contrast

On white

5.14

#3A66D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.08

#3A66D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3A66D9

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A66D9	#FFFFFF	#000000	##FFFFFF
##3A66D9	1.00	5.14	4.08	5.14
#FFFFFF	5.14	1.00	21.00	1.00
#000000	4.08	21.00	1.00	21.00
##FFFFFF	5.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D75DD

Deuteranopia (green-blind)

#0066D7

Tritanopia (blue-blind)

#008296

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3a66d9;
/* rgb */ color: rgb(58, 102, 217);
/* oklch */ color: oklch(54.5% 0.183 265.0);

Tailwind

colors: {
  custom: {
    50: '#8591e5',
    500: '#3a66d9',
    950: '#000000',
  },
}

SCSS

$custom: #3a66d9;
$custom-light: #8591e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3a66d9",
  "rgb": {
    "r": 58,
    "g": 102,
    "b": 217
  },
  "hsl": {
    "h": 223.396,
    "s": 67.66,
    "l": 53.922
  },
  "oklch": {
    "l": 0.54487,
    "c": 0.18323,
    "h": 265
  },
  "luminance": 0.15412
}

Semantic roles & 50–950 ramp

primary

#3A66D9

secondary

#D9C795

accent

#BB3DEB

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0D0C16

muted

#7D7D84

Preview Lab

Preview with #3A66D9

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

Preview Lab → · Contrast checker → · Palette generator →