#666FD5#666FD5

#666FD5 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.4% C 0.154 H 276.7°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#666FD5
RGB	rgb(102, 111, 213)
HSL	hsl(235, 57%, 62%)
HSV	hsv(235, 52%, 84%)
CMYK	cmyk(52.1%, 47.9%, 0%, 16.5%)
CIE-LAB	lab(50.68, 24.92, -53.76)
CIE-LCH	lch(50.68, 59.26, 294.87°)
OKLab	oklab(58.45% 0.018 -0.1531)
OKLCH	oklch(58.45% 0.154 276.7)
XYZ	xyz(23.1704, 18.9963, 65.3836)
Luminance	0.1900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FD5 #D5CC66

analogous

#66A7D5 #666FD5 #9566D5

triadic

#666FD5 #D5666F #6FD566

tetradic

#666FD5 #D566A7 #D5CC66 #66D595

square

#666FD5 #D566A7 #D5CC66 #66D595

split-complementary

#666FD5 #D59566 #A7D566

monochromatic

#293297 #3742C7 #666FD5 #969CE2 #C6C9EF

Accessibility & contrast

On white

4.38

#666FD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#666FD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FD5

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FD5	#FFFFFF	#000000	##000000
##666FD5	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#407DD9

Deuteranopia (green-blind)

#3474D3

Tritanopia (blue-blind)

#358598

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666fd5;
/* rgb */ color: rgb(102, 111, 213);
/* oklch */ color: oklch(58.4% 0.154 276.7);

Tailwind

colors: {
  custom: {
    50: '#9998e2',
    500: '#666fd5',
    950: '#000000',
  },
}

SCSS

$custom: #666fd5;
$custom-light: #9998e2;
$custom-dark: #000000;

JSON

{
  "hex": "#666fd5",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 213
  },
  "hsl": {
    "h": 235.135,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.58445,
    "c": 0.15421,
    "h": 276.7
  },
  "luminance": 0.18998
}

Semantic roles & 50–950 ramp

primary

#666FD5

secondary

#E0DDB7

accent

#B721C4

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666FD5

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

Preview Lab → · Contrast checker → · Palette generator →