#666EF1#666EF1

#666EF1 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 60.2% C 0.193 H 276.3°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#666EF1
RGB	rgb(102, 110, 241)
HSL	hsl(237, 83%, 67%)
HSV	hsv(237, 58%, 95%)
CMYK	cmyk(57.7%, 54.4%, 0%, 5.5%)
CIE-LAB	lab(52.20, 34.41, -67.07)
CIE-LCH	lch(52.20, 75.38, 297.16°)
OKLab	oklab(60.15% 0.0211 -0.1923)
OKLCH	oklch(60.15% 0.193 276.3)
XYZ	xyz(26.9275, 20.3255, 85.7063)
Luminance	0.2033 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EF1 #F1E966

analogous

#66B3F1 #666EF1 #A466F1

triadic

#666EF1 #F1666E #6EF166

tetradic

#666EF1 #F166B3 #F1E966 #66F1A4

square

#666EF1 #F166B3 #F1E966 #66F1A4

split-complementary

#666EF1 #F1A466 #B3F166

monochromatic

#121DCA #2E39EC #666EF1 #9EA3F6 #D6D8FB

Accessibility & contrast

On white

4.15

#666EF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#666EF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EF1

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EF1	#FFFFFF	#000000	##000000
##666EF1	1.00	4.15	5.07	5.07
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D82F6

Deuteranopia (green-blind)

#0077EE

Tritanopia (blue-blind)

#008DA5

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666ef1;
/* rgb */ color: rgb(102, 110, 241);
/* oklch */ color: oklch(60.2% 0.193 276.3);

Tailwind

colors: {
  custom: {
    50: '#9d97f6',
    500: '#666ef1',
    950: '#000000',
  },
}

SCSS

$custom: #666ef1;
$custom-light: #9d97f6;
$custom-dark: #000000;

JSON

{
  "hex": "#666ef1",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 241
  },
  "hsl": {
    "h": 236.547,
    "s": 83.234,
    "l": 67.255
  },
  "oklch": {
    "l": 0.60154,
    "c": 0.19346,
    "h": 276.3
  },
  "luminance": 0.20328
}

Semantic roles & 50–950 ramp

primary

#666EF1

secondary

#EFEDC3

accent

#D306E0

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666EF1

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

Preview Lab → · Contrast checker → · Palette generator →