#3C66CB#3C66CB

#3C66CB is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.5% C 0.164 H 264.5°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#3C66CB
RGB	rgb(60, 102, 203)
HSL	hsl(222, 58%, 52%)
HSV	hsv(222, 70%, 80%)
CMYK	cmyk(70.4%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(45.32, 19.53, -56.79)
CIE-LCH	lch(45.32, 60.06, 288.98°)
OKLab	oklab(53.55% -0.0157 -0.1631)
OKLCH	oklch(53.55% 0.164 264.5)
XYZ	xyz(17.3905, 14.7734, 58.4234)
Luminance	0.1477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3C66CB #CBA13C

analogous

#3CADCB #3C66CB #5A3CCB

triadic

#3C66CB #CB3C66 #66CB3C

tetradic

#3C66CB #CB3CAD #CBA13C #3CCB5A

square

#3C66CB #CB3CAD #CBA13C #3CCB5A

split-complementary

#3C66CB #CB5A3C #ADCB3C

monochromatic

#1E366F #2A4D9F #3C66CB #6C8CD8 #9DB2E5

Accessibility & contrast

On white

5.31

#3C66CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#3C66CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3C66CB

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3C66CB	#FFFFFF	#000000	##FFFFFF
##3C66CB	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)

#2B72CF

Deuteranopia (green-blind)

#0065C9

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3c66cb;
/* rgb */ color: rgb(60, 102, 203);
/* oklch */ color: oklch(53.5% 0.164 264.5);

Tailwind

colors: {
  custom: {
    50: '#8391db',
    500: '#3c66cb',
    950: '#000000',
  },
}

SCSS

$custom: #3c66cb;
$custom-light: #8391db;
$custom-dark: #000000;

JSON

{
  "hex": "#3c66cb",
  "rgb": {
    "r": 60,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 222.378,
    "s": 57.895,
    "l": 51.569
  },
  "oklch": {
    "l": 0.53548,
    "c": 0.16382,
    "h": 264.5
  },
  "luminance": 0.14775
}

Semantic roles & 50–950 ramp

primary

#3C66CB

secondary

#D1BE92

accent

#B447E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3C66CB

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

Preview Lab → · Contrast checker → · Palette generator →