#666EF7#666EF7

#666EF7 is a mid, highly saturated blue. Relative luminance 0.207; OKLCH L 60.6% C 0.201 H 276.1°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#666EF7
RGB	rgb(102, 110, 247)
HSL	hsl(237, 90%, 68%)
HSV	hsv(237, 59%, 97%)
CMYK	cmyk(58.7%, 55.5%, 0%, 3.1%)
CIE-LAB	lab(52.61, 36.33, -69.76)
CIE-LCH	lch(52.61, 78.65, 297.51°)
OKLab	oklab(60.59% 0.0213 -0.2002)
OKLCH	oklch(60.59% 0.201 276.1)
XYZ	xyz(27.8385, 20.6899, 90.5042)
Luminance	0.2069 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EF7 #F7EF66

analogous

#66B6F7 #666EF7 #A666F7

triadic

#666EF7 #F7666E #6EF766

tetradic

#666EF7 #F766B6 #F7EF66 #66F7A6

square

#666EF7 #F766B6 #F7EF66 #66F7A6

split-complementary

#666EF7 #F7A666 #B6F766

monochromatic

#0B17D7 #2C37F4 #666EF7 #A0A5FA #DADCFD

Accessibility & contrast

On white

4.09

#666EF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#666EF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EF7

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EF7	#FFFFFF	#000000	##000000
##666EF7	1.00	4.09	5.14	5.14
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0084FC

Deuteranopia (green-blind)

#0078F4

Tritanopia (blue-blind)

#008EA8

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666ef7;
/* rgb */ color: rgb(102, 110, 247);
/* oklch */ color: oklch(60.6% 0.201 276.1);

Tailwind

colors: {
  custom: {
    50: '#9e97fb',
    500: '#666ef7',
    950: '#000000',
  },
}

SCSS

$custom: #666ef7;
$custom-light: #9e97fb;
$custom-dark: #000000;

JSON

{
  "hex": "#666ef7",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 247
  },
  "hsl": {
    "h": 236.69,
    "s": 90.062,
    "l": 68.431
  },
  "oklch": {
    "l": 0.60585,
    "c": 0.20133,
    "h": 276.1
  },
  "luminance": 0.20692
}

Semantic roles & 50–950 ramp

primary

#666EF7

secondary

#F2F0C7

accent

#D900E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666EF7

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

Preview Lab → · Contrast checker → · Palette generator →