#3A66CC#3A66CC

#3A66CC is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.5% C 0.166 H 264.1°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#3A66CC
RGB	rgb(58, 102, 204)
HSL	hsl(222, 59%, 51%)
HSV	hsv(222, 72%, 80%)
CMYK	cmyk(71.6%, 50%, 0%, 20%)
CIE-LAB	lab(45.30, 19.62, -57.40)
CIE-LCH	lch(45.30, 60.66, 288.87°)
OKLab	oklab(53.53% -0.0172 -0.1649)
OKLCH	oklch(53.53% 0.166 264.1)
XYZ	xyz(17.3915, 14.7601, 59.0474)
Luminance	0.1476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A66CC #CCA03A

analogous

#3AAFCC #3A66CC #573ACC

triadic

#3A66CC #CC3A66 #66CC3A

tetradic

#3A66CC #CC3AAF #CCA03A #3ACC57

square

#3A66CC #CC3AAF #CCA03A #3ACC57

split-complementary

#3A66CC #CC573A #AFCC3A

monochromatic

#1D356F #294DA0 #3A66CC #6B8CD9 #9BB2E5

Accessibility & contrast

On white

5.31

#3A66CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#3A66CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3A66CC

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A66CC	#FFFFFF	#000000	##FFFFFF
##3A66CC	1.00	5.31	3.95	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2972D0

Deuteranopia (green-blind)

#0065CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3a66cc;
/* rgb */ color: rgb(58, 102, 204);
/* oklch */ color: oklch(53.5% 0.166 264.1);

Tailwind

colors: {
  custom: {
    50: '#8291dc',
    500: '#3a66cc',
    950: '#000000',
  },
}

SCSS

$custom: #3a66cc;
$custom-light: #8291dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3a66cc",
  "rgb": {
    "r": 58,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 221.918,
    "s": 58.871,
    "l": 51.373
  },
  "oklch": {
    "l": 0.53532,
    "c": 0.16579,
    "h": 264.1
  },
  "luminance": 0.14762
}

Semantic roles & 50–950 ramp

primary

#3A66CC

secondary

#D1BE91

accent

#B346E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3A66CC

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

Preview Lab → · Contrast checker → · Palette generator →