#666EFF#666EFF

#666EFF is a mid, highly saturated blue. Relative luminance 0.212; OKLCH L 61.2% C 0.212 H 275.8°. Best body text is #000000 at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#666EFF
RGB	rgb(102, 110, 255)
HSL	hsl(237, 100%, 70%)
HSV	hsv(237, 60%, 100%)
CMYK	cmyk(60%, 56.9%, 0%, 0%)
CIE-LAB	lab(53.16, 38.88, -73.29)
CIE-LCH	lch(53.16, 82.97, 297.94°)
OKLab	oklab(61.17% 0.0214 -0.2106)
OKLCH	oklch(61.17% 0.212 275.8)
XYZ	xyz(29.0995, 21.1944, 97.1458)
Luminance	0.2120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EFF #FFF766

analogous

#66BAFF #666EFF #AB66FF

triadic

#666EFF #FF666E #6EFF66

tetradic

#666EFF #FF66BA #FFF766 #66FFAB

square

#666EFF #FF66BA #FFF766 #66FFAB

split-complementary

#666EFF #FFAB66 #BAFF66

monochromatic

#000CEB #2934FF #666EFF #A3A8FF #E0E2FF

Accessibility & contrast

On white

4.01

#666EFF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.24

#666EFF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EFF

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EFF	#FFFFFF	#000000	##000000
##666EFF	1.00	4.01	5.24	5.24
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.24	21.00	1.00	1.00
##000000	5.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0086FF

Deuteranopia (green-blind)

#0078FC

Tritanopia (blue-blind)

#0091AC

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #666eff;
/* rgb */ color: rgb(102, 110, 255);
/* oklch */ color: oklch(61.2% 0.212 275.8);

Tailwind

colors: {
  custom: {
    50: '#9f97ff',
    500: '#666eff',
    950: '#000000',
  },
}

SCSS

$custom: #666eff;
$custom-light: #9f97ff;
$custom-dark: #000000;

JSON

{
  "hex": "#666eff",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 255
  },
  "hsl": {
    "h": 236.863,
    "s": 100,
    "l": 70
  },
  "oklch": {
    "l": 0.61171,
    "c": 0.21168,
    "h": 275.8
  },
  "luminance": 0.21197
}

Semantic roles & 50–950 ramp

primary

#666EFF

secondary

#F6F4CB

accent

#DA00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666EFF

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

Preview Lab → · Contrast checker → · Palette generator →