#668CEF#668CEF

#668CEF is a light, vivid blue. Relative luminance 0.278; OKLCH L 65.8% C 0.154 H 266.4°. Best body text is #000000 at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#668CEF
RGB	rgb(102, 140, 239)
HSL	hsl(223, 81%, 67%)
HSV	hsv(223, 57%, 94%)
CMYK	cmyk(57.3%, 41.4%, 0%, 6.3%)
CIE-LAB	lab(59.72, 15.69, -53.90)
CIE-LCH	lch(59.72, 56.14, 286.23°)
OKLab	oklab(65.82% -0.0096 -0.1533)
OKLCH	oklch(65.82% 0.154 266.4)
XYZ	xyz(30.4323, 27.8105, 85.4089)
Luminance	0.2781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#668CEF #EFC966

analogous

#66D0EF #668CEF #8566EF

triadic

#668CEF #EF668C #8CEF66

tetradic

#668CEF #EF66D0 #EFC966 #66EF85

square

#668CEF #EF66D0 #EFC966 #66EF85

split-complementary

#668CEF #EF8566 #D0EF66

monochromatic

#1546C6 #2F62E9 #668CEF #9DB6F5 #D5DFFB

Accessibility & contrast

On white

3.20

#668CEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.56

#668CEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #668CEF

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##668CEF	#FFFFFF	#000000	##000000
##668CEF	1.00	3.20	6.56	6.56
#FFFFFF	3.20	1.00	21.00	21.00
#000000	6.56	21.00	1.00	1.00
##000000	6.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6196F3

Deuteranopia (green-blind)

#4F8AED

Tritanopia (blue-blind)

#00A2B2

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #668cef;
/* rgb */ color: rgb(102, 140, 239);
/* oklch */ color: oklch(65.8% 0.154 266.4);

Tailwind

colors: {
  custom: {
    50: '#9badf5',
    500: '#668cef',
    950: '#000000',
  },
}

SCSS

$custom: #668cef;
$custom-light: #9badf5;
$custom-dark: #000000;

JSON

{
  "hex": "#668cef",
  "rgb": {
    "r": 102,
    "g": 140,
    "b": 239
  },
  "hsl": {
    "h": 223.358,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.65817,
    "c": 0.15358,
    "h": 266.4
  },
  "luminance": 0.27813
}

Semantic roles & 50–950 ramp

primary

#668CEF

secondary

#EEE2C2

accent

#A208DD

background

#FAFAFF

surface

#F4F4FE

border

#CECED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #668CEF

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

Preview Lab → · Contrast checker → · Palette generator →