#666FE8#666FE8

#666FE8 is a mid, vivid blue. Relative luminance 0.200; OKLCH L 59.7% C 0.180 H 276.3°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#666FE8
RGB	rgb(102, 111, 232)
HSL	hsl(236, 74%, 65%)
HSV	hsv(236, 56%, 91%)
CMYK	cmyk(56%, 52.2%, 0%, 9%)
CIE-LAB	lab(51.86, 30.94, -62.60)
CIE-LCH	lch(51.86, 69.82, 296.30°)
OKLab	oklab(59.71% 0.0197 -0.1791)
OKLCH	oklch(59.71% 0.18 276.3)
XYZ	xyz(25.7247, 20.0180, 78.8366)
Luminance	0.2002 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FE8 #E8DF66

analogous

#66B0E8 #666FE8 #9E66E8

triadic

#666FE8 #E8666F #6FE866

tetradic

#666FE8 #E866B0 #E8DF66 #66E89E

square

#666FE8 #E866B0 #E8DF66 #66E89E

split-complementary

#666FE8 #E89E66 #B0E866

monochromatic

#1C26B8 #313DE0 #666FE8 #9BA1F0 #D0D3F8

Accessibility & contrast

On white

4.20

#666FE8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.00

#666FE8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FE8

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FE8	#FFFFFF	#000000	##000000
##666FE8	1.00	4.20	5.00	5.00
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.00	21.00	1.00	1.00
##000000	5.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2981EC

Deuteranopia (green-blind)

#0576E5

Tritanopia (blue-blind)

#1A8BA1

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666fe8;
/* rgb */ color: rgb(102, 111, 232);
/* oklch */ color: oklch(59.7% 0.180 276.3);

Tailwind

colors: {
  custom: {
    50: '#9c98f0',
    500: '#666fe8',
    950: '#000000',
  },
}

SCSS

$custom: #666fe8;
$custom-light: #9c98f0;
$custom-dark: #000000;

JSON

{
  "hex": "#666fe8",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 232
  },
  "hsl": {
    "h": 235.846,
    "s": 73.864,
    "l": 65.49
  },
  "oklch": {
    "l": 0.59708,
    "c": 0.1802,
    "h": 276.3
  },
  "luminance": 0.2002
}

Semantic roles & 50–950 ramp

primary

#666FE8

secondary

#EBE8BF

accent

#C810D6

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666FE8

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

Preview Lab → · Contrast checker → · Palette generator →