#0066CD#0066CD

#0066CD is a mid, vivid cyan. Relative luminance 0.139; OKLCH L 52.3% C 0.178 H 256.0°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#0066CD
RGB	rgb(0, 102, 205)
HSL	hsl(210, 100%, 40%)
HSV	hsv(210, 100%, 80%)
CMYK	cmyk(100%, 50.2%, 0%, 19.6%)
CIE-LAB	lab(44.10, 15.67, -59.98)
CIE-LCH	lch(44.10, 61.99, 284.64°)
OKLab	oklab(52.27% -0.0432 -0.1731)
OKLCH	oklch(52.27% 0.178 256)
XYZ	xyz(15.7667, 13.9084, 59.5993)
Luminance	0.1391 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0066CD #CD6700

analogous

#00CDCD #0066CD #0000CD

triadic

#0066CD #CD0066 #66CD00

tetradic

#0066CD #CD00CD #CD6700 #00CD00

square

#0066CD #CD00CD #CD6700 #00CD00

split-complementary

#0066CD #CD0000 #CDCD00

monochromatic

#002953 #004890 #0066CD #0B85FF #48A3FF

Accessibility & contrast

On white

5.55

#0066CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#0066CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #0066CD

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0066CD	#FFFFFF	#000000	##FFFFFF
##0066CD	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2071D1

Deuteranopia (green-blind)

#0061CB

Tritanopia (blue-blind)

#007F90

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #0066cd;
/* rgb */ color: rgb(0, 102, 205);
/* oklch */ color: oklch(52.3% 0.178 256.0);

Tailwind

colors: {
  custom: {
    50: '#7690dd',
    500: '#0066cd',
    950: '#000000',
  },
}

SCSS

$custom: #0066cd;
$custom-light: #7690dd;
$custom-dark: #000000;

JSON

{
  "hex": "#0066cd",
  "rgb": {
    "r": 0,
    "g": 102,
    "b": 205
  },
  "hsl": {
    "h": 210.146,
    "s": 100,
    "l": 40.196
  },
  "oklch": {
    "l": 0.52272,
    "c": 0.17837,
    "h": 256
  },
  "luminance": 0.13911
}

Semantic roles & 50–950 ramp

primary

#0066CD

secondary

#DF954A

accent

#9429FF

background

#F8F8FD

surface

#EFF0FB

border

#CACBD4

text

#0B0C15

muted

#7C7D83

Preview Lab

Preview with #0066CD

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

Preview Lab → · Contrast checker → · Palette generator →