#666BE9#666BE9

#666BE9 is a mid, vivid blue. Relative luminance 0.192; OKLCH L 59.0% C 0.187 H 277.3°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#666BE9
RGB	rgb(102, 107, 233)
HSL	hsl(238, 75%, 66%)
HSV	hsv(238, 56%, 91%)
CMYK	cmyk(56.2%, 54.1%, 0%, 8.6%)
CIE-LAB	lab(50.95, 33.67, -64.63)
CIE-LCH	lch(50.95, 72.87, 297.52°)
OKLab	oklab(59.05% 0.0238 -0.1851)
OKLCH	oklch(59.05% 0.187 277.3)
XYZ	xyz(25.4405, 19.2216, 79.4445)
Luminance	0.1922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BE9 #E9E466

analogous

#66ACE9 #666BE9 #A266E9

triadic

#666BE9 #E9666B #6BE966

tetradic

#666BE9 #E966AC #E9E466 #66E9A2

square

#666BE9 #E966AC #E9E466 #66E9A2

split-complementary

#666BE9 #E9A266 #ACE966

monochromatic

#1B21BA #3037E1 #666BE9 #9C9FF1 #D1D3F8

Accessibility & contrast

On white

4.33

#666BE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#666BE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BE9

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BE9	#FFFFFF	#000000	##000000
##666BE9	1.00	4.33	4.84	4.84
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#167FED

Deuteranopia (green-blind)

#0074E6

Tritanopia (blue-blind)

#1988A0

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666be9;
/* rgb */ color: rgb(102, 107, 233);
/* oklch */ color: oklch(59.0% 0.187 277.3);

Tailwind

colors: {
  custom: {
    50: '#9c95f1',
    500: '#666be9',
    950: '#000000',
  },
}

SCSS

$custom: #666be9;
$custom-light: #9c95f1;
$custom-dark: #000000;

JSON

{
  "hex": "#666be9",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 233
  },
  "hsl": {
    "h": 237.71,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.59046,
    "c": 0.18666,
    "h": 277.3
  },
  "luminance": 0.19223
}

Semantic roles & 50–950 ramp

primary

#666BE9

secondary

#EBEAC0

accent

#CF0ED7

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666BE9

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

Preview Lab → · Contrast checker → · Palette generator →