#666FE1#666FE1

#666FE1 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.2% C 0.171 H 276.5°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#666FE1
RGB	rgb(102, 111, 225)
HSL	hsl(236, 67%, 64%)
HSV	hsv(236, 55%, 88%)
CMYK	cmyk(54.7%, 50.7%, 0%, 11.8%)
CIE-LAB	lab(51.41, 28.71, -59.38)
CIE-LCH	lch(51.41, 65.95, 295.81°)
OKLab	oklab(59.23% 0.0192 -0.1696)
OKLCH	oklch(59.23% 0.171 276.5)
XYZ	xyz(24.7502, 19.6282, 73.7040)
Luminance	0.1963 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FE1 #E1D866

analogous

#66ADE1 #666FE1 #9B66E1

triadic

#666FE1 #E1666F #6FE166

tetradic

#666FE1 #E166AD #E1D866 #66E19B

square

#666FE1 #E166AD #E1D866 #66E19B

split-complementary

#666FE1 #E19B66 #ADE166

monochromatic

#222CAB #333FD7 #666FE1 #999FEB #CCCFF5

Accessibility & contrast

On white

4.26

#666FE1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#666FE1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FE1

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FE1	#FFFFFF	#000000	##000000
##666FE1	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3380E5

Deuteranopia (green-blind)

#1F76DF

Tritanopia (blue-blind)

#27899D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666fe1;
/* rgb */ color: rgb(102, 111, 225);
/* oklch */ color: oklch(59.2% 0.171 276.5);

Tailwind

colors: {
  custom: {
    50: '#9b98eb',
    500: '#666fe1',
    950: '#000000',
  },
}

SCSS

$custom: #666fe1;
$custom-light: #9b98eb;
$custom-dark: #000000;

JSON

{
  "hex": "#666fe1",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 225
  },
  "hsl": {
    "h": 235.61,
    "s": 67.213,
    "l": 64.118
  },
  "oklch": {
    "l": 0.59233,
    "c": 0.17072,
    "h": 276.5
  },
  "luminance": 0.1963
}

Semantic roles & 50–950 ramp

primary

#666FE1

secondary

#E7E4BC

accent

#C216CF

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666FE1

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

Preview Lab → · Contrast checker → · Palette generator →