#666EE7#666EE7

#666EE7 is a mid, vivid blue. Relative luminance 0.197; OKLCH L 59.5% C 0.180 H 276.6°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#666EE7
RGB	rgb(102, 110, 231)
HSL	hsl(236, 73%, 65%)
HSV	hsv(236, 56%, 91%)
CMYK	cmyk(55.8%, 52.4%, 0%, 9.4%)
CIE-LAB	lab(51.55, 31.22, -62.54)
CIE-LCH	lch(51.55, 69.90, 296.53°)
OKLab	oklab(59.45% 0.0207 -0.1789)
OKLCH	oklch(59.45% 0.18 276.6)
XYZ	xyz(25.4746, 19.7444, 78.0545)
Luminance	0.1975 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EE7 #E7DF66

analogous

#66AEE7 #666EE7 #9E66E7

triadic

#666EE7 #E7666E #6EE766

tetradic

#666EE7 #E766AE #E7DF66 #66E79E

square

#666EE7 #E766AE #E7DF66 #66E79E

split-complementary

#666EE7 #E79E66 #AEE766

monochromatic

#1D26B6 #313CDF #666EE7 #9BA0EF #D0D2F8

Accessibility & contrast

On white

4.24

#666EE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#666EE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EE7

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EE7	#FFFFFF	#000000	##000000
##666EE7	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2780EB

Deuteranopia (green-blind)

#0376E4

Tritanopia (blue-blind)

#1D8AA0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666ee7;
/* rgb */ color: rgb(102, 110, 231);
/* oklch */ color: oklch(59.5% 0.180 276.6);

Tailwind

colors: {
  custom: {
    50: '#9b97ef',
    500: '#666ee7',
    950: '#000000',
  },
}

SCSS

$custom: #666ee7;
$custom-light: #9b97ef;
$custom-dark: #000000;

JSON

{
  "hex": "#666ee7",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 231
  },
  "hsl": {
    "h": 236.279,
    "s": 72.881,
    "l": 65.294
  },
  "oklch": {
    "l": 0.59454,
    "c": 0.18014,
    "h": 276.6
  },
  "luminance": 0.19746
}

Semantic roles & 50–950 ramp

primary

#666EE7

secondary

#EAE7BF

accent

#C911D5

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666EE7

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

Preview Lab → · Contrast checker → · Palette generator →