#666DE5#666DE5

#666DE5 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.1% C 0.179 H 276.9°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#666DE5
RGB	rgb(102, 109, 229)
HSL	hsl(237, 71%, 65%)
HSV	hsv(237, 55%, 90%)
CMYK	cmyk(55.5%, 52.4%, 0%, 10.2%)
CIE-LAB	lab(51.17, 31.19, -62.02)
CIE-LCH	lch(51.17, 69.42, 296.70°)
OKLab	oklab(59.13% 0.0216 -0.1774)
OKLCH	oklch(59.13% 0.179 276.9)
XYZ	xyz(25.0865, 19.4175, 76.5396)
Luminance	0.1942 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DE5 #E5DE66

analogous

#66ACE5 #666DE5 #9F66E5

triadic

#666DE5 #E5666D #6DE566

tetradic

#666DE5 #E566AC #E5DE66 #66E59F

square

#666DE5 #E566AC #E5DE66 #66E59F

split-complementary

#666DE5 #E59F66 #ACE566

monochromatic

#1E26B2 #323BDC #666DE5 #9A9FEE #CFD1F7

Accessibility & contrast

On white

4.30

#666DE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#666DE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DE5

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DE5	#FFFFFF	#000000	##000000
##666DE5	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#277FE9

Deuteranopia (green-blind)

#0675E2

Tritanopia (blue-blind)

#21889F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666de5;
/* rgb */ color: rgb(102, 109, 229);
/* oklch */ color: oklch(59.1% 0.179 276.9);

Tailwind

colors: {
  custom: {
    50: '#9b96ee',
    500: '#666de5',
    950: '#000000',
  },
}

SCSS

$custom: #666de5;
$custom-light: #9b96ee;
$custom-dark: #000000;

JSON

{
  "hex": "#666de5",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 229
  },
  "hsl": {
    "h": 236.693,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.59132,
    "c": 0.17874,
    "h": 276.9
  },
  "luminance": 0.19419
}

Semantic roles & 50–950 ramp

primary

#666DE5

secondary

#E9E7BE

accent

#C813D3

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666DE5

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

Preview Lab → · Contrast checker → · Palette generator →