#666BF5#666BF5

#666BF5 is a mid, highly saturated blue. Relative luminance 0.199; OKLCH L 59.9% C 0.202 H 276.8°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#666BF5
RGB	rgb(102, 107, 245)
HSL	hsl(238, 88%, 68%)
HSV	hsv(238, 58%, 96%)
CMYK	cmyk(58.4%, 56.3%, 0%, 3.9%)
CIE-LAB	lab(51.76, 37.48, -70.02)
CIE-LCH	lch(51.76, 79.42, 298.16°)
OKLab	oklab(59.91% 0.024 -0.201)
OKLCH	oklch(59.91% 0.202 276.8)
XYZ	xyz(27.2133, 19.9307, 88.7815)
Luminance	0.1993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BF5 #F5F066

analogous

#66B2F5 #666BF5 #A866F5

triadic

#666BF5 #F5666B #6BF566

tetradic

#666BF5 #F566B2 #F5F066 #66F5A8

square

#666BF5 #F566B2 #F5F066 #66F5A8

split-complementary

#666BF5 #F5A866 #B2F566

monochromatic

#0E15D3 #2D33F1 #666BF5 #9FA3F9 #D9DAFD

Accessibility & contrast

On white

4.21

#666BF5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#666BF5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BF5

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BF5	#FFFFFF	#000000	##000000
##666BF5	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0082FA

Deuteranopia (green-blind)

#0075F2

Tritanopia (blue-blind)

#008CA6

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666bf5;
/* rgb */ color: rgb(102, 107, 245);
/* oklch */ color: oklch(59.9% 0.202 276.8);

Tailwind

colors: {
  custom: {
    50: '#9e95f9',
    500: '#666bf5',
    950: '#000000',
  },
}

SCSS

$custom: #666bf5;
$custom-light: #9e95f9;
$custom-dark: #000000;

JSON

{
  "hex": "#666bf5",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 245
  },
  "hsl": {
    "h": 237.902,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.59909,
    "c": 0.20243,
    "h": 276.8
  },
  "luminance": 0.19933
}

Semantic roles & 50–950 ramp

primary

#666BF5

secondary

#F1F0C6

accent

#DC01E4

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666BF5

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

Preview Lab → · Contrast checker → · Palette generator →