#666EFA#666EFA

#666EFA is a mid, highly saturated blue. Relative luminance 0.209; OKLCH L 60.8% C 0.205 H 276.0°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#666EFA
RGB	rgb(102, 110, 250)
HSL	hsl(237, 94%, 69%)
HSV	hsv(237, 59%, 98%)
CMYK	cmyk(59.2%, 56%, 0%, 2%)
CIE-LAB	lab(52.81, 37.28, -71.09)
CIE-LCH	lch(52.81, 80.27, 297.68°)
OKLab	oklab(60.8% 0.0213 -0.2041)
OKLCH	oklch(60.8% 0.205 276)
XYZ	xyz(28.3051, 20.8766, 92.9619)
Luminance	0.2088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EFA #FAF266

analogous

#66B8FA #666EFA #A866FA

triadic

#666EFA #FA666E #6EFA66

tetradic

#666EFA #FA66B8 #FAF266 #66FAA8

square

#666EFA #FA66B8 #FAF266 #66FAA8

split-complementary

#666EFA #FAA866 #B8FA66

monochromatic

#0713DE #2B36F8 #666EFA #A1A6FC #DDDEFE

Accessibility & contrast

On white

4.06

#666EFA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#666EFA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EFA

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EFA	#FFFFFF	#000000	##000000
##666EFA	1.00	4.06	5.18	5.18
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0085FF

Deuteranopia (green-blind)

#0078F7

Tritanopia (blue-blind)

#008FA9

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666efa;
/* rgb */ color: rgb(102, 110, 250);
/* oklch */ color: oklch(60.8% 0.205 276.0);

Tailwind

colors: {
  custom: {
    50: '#9e97fd',
    500: '#666efa',
    950: '#000000',
  },
}

SCSS

$custom: #666efa;
$custom-light: #9e97fd;
$custom-dark: #000000;

JSON

{
  "hex": "#666efa",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 250
  },
  "hsl": {
    "h": 236.757,
    "s": 93.671,
    "l": 69.02
  },
  "oklch": {
    "l": 0.60803,
    "c": 0.20523,
    "h": 276
  },
  "luminance": 0.20879
}

Semantic roles & 50–950 ramp

primary

#666EFA

secondary

#F4F1C8

accent

#D900E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666EFA

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

Preview Lab → · Contrast checker → · Palette generator →