#3A66CB#3A66CB

#3A66CB is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.5% C 0.164 H 264.0°. Best body text is #FFFFFF at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#3A66CB
RGB	rgb(58, 102, 203)
HSL	hsl(222, 58%, 51%)
HSV	hsv(222, 71%, 80%)
CMYK	cmyk(71.4%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(45.24, 19.25, -56.93)
CIE-LCH	lch(45.24, 60.10, 288.68°)
OKLab	oklab(53.46% -0.0173 -0.1635)
OKLCH	oklch(53.46% 0.164 264)
XYZ	xyz(17.2720, 14.7123, 58.4178)
Luminance	0.1471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A66CB #CB9F3A

analogous

#3AAECB #3A66CB #563ACB

triadic

#3A66CB #CB3A66 #66CB3A

tetradic

#3A66CB #CB3AAE #CB9F3A #3ACB56

square

#3A66CB #CB3AAE #CB9F3A #3ACB56

split-complementary

#3A66CB #CB563A #AECB3A

monochromatic

#1D356E #2A4D9E #3A66CB #6A8CD8 #9BB1E5

Accessibility & contrast

On white

5.33

#3A66CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.94

#3A66CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3A66CB

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A66CB	#FFFFFF	#000000	##FFFFFF
##3A66CB	1.00	5.33	3.94	5.33
#FFFFFF	5.33	1.00	21.00	1.00
#000000	3.94	21.00	1.00	21.00
##FFFFFF	5.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B72CF

Deuteranopia (green-blind)

#0065C9

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3a66cb;
/* rgb */ color: rgb(58, 102, 203);
/* oklch */ color: oklch(53.5% 0.164 264.0);

Tailwind

colors: {
  custom: {
    50: '#8291db',
    500: '#3a66cb',
    950: '#000000',
  },
}

SCSS

$custom: #3a66cb;
$custom-light: #8291db;
$custom-dark: #000000;

JSON

{
  "hex": "#3a66cb",
  "rgb": {
    "r": 58,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 221.793,
    "s": 58.233,
    "l": 51.176
  },
  "oklch": {
    "l": 0.5346,
    "c": 0.16443,
    "h": 264
  },
  "luminance": 0.14714
}

Semantic roles & 50–950 ramp

primary

#3A66CB

secondary

#D0BD90

accent

#B246E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3A66CB

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

Preview Lab → · Contrast checker → · Palette generator →