#666EF8#666EF8

#666EF8 is a mid, highly saturated blue. Relative luminance 0.208; OKLCH L 60.7% C 0.203 H 276.0°. Best body text is #000000 at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#666EF8
RGB	rgb(102, 110, 248)
HSL	hsl(237, 91%, 69%)
HSV	hsv(237, 59%, 97%)
CMYK	cmyk(58.9%, 55.6%, 0%, 2.7%)
CIE-LAB	lab(52.68, 36.65, -70.20)
CIE-LCH	lch(52.68, 79.19, 297.56°)
OKLab	oklab(60.66% 0.0213 -0.2015)
OKLCH	oklch(60.66% 0.203 276)
XYZ	xyz(27.9932, 20.7518, 91.3191)
Luminance	0.2075 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EF8 #F8F066

analogous

#66B7F8 #666EF8 #A766F8

triadic

#666EF8 #F8666E #6EF866

tetradic

#666EF8 #F866B7 #F8F066 #66F8A7

square

#666EF8 #F866B7 #F8F066 #66F8A7

split-complementary

#666EF8 #F8A766 #B7F866

monochromatic

#0A15DA #2B37F5 #666EF8 #A1A5FB #DBDDFD

Accessibility & contrast

On white

4.08

#666EF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.15

#666EF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EF8

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EF8	#FFFFFF	#000000	##000000
##666EF8	1.00	4.08	5.15	5.15
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.15	21.00	1.00	1.00
##000000	5.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0084FD

Deuteranopia (green-blind)

#0078F5

Tritanopia (blue-blind)

#008FA8

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666ef8;
/* rgb */ color: rgb(102, 110, 248);
/* oklch */ color: oklch(60.7% 0.203 276.0);

Tailwind

colors: {
  custom: {
    50: '#9e97fb',
    500: '#666ef8',
    950: '#000000',
  },
}

SCSS

$custom: #666ef8;
$custom-light: #9e97fb;
$custom-dark: #000000;

JSON

{
  "hex": "#666ef8",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 248
  },
  "hsl": {
    "h": 236.712,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.60658,
    "c": 0.20262,
    "h": 276
  },
  "luminance": 0.20754
}

Semantic roles & 50–950 ramp

primary

#666EF8

secondary

#F3F0C7

accent

#D900E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666EF8

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

Preview Lab → · Contrast checker → · Palette generator →