#666EEF#666EEF

#666EEF is a mid, vivid blue. Relative luminance 0.202; OKLCH L 60.0% C 0.191 H 276.3°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#666EEF
RGB	rgb(102, 110, 239)
HSL	hsl(236, 81%, 67%)
HSV	hsv(236, 57%, 94%)
CMYK	cmyk(57.3%, 54%, 0%, 6.3%)
CIE-LAB	lab(52.07, 33.77, -66.17)
CIE-LCH	lch(52.07, 74.29, 297.04°)
OKLab	oklab(60.01% 0.0211 -0.1897)
OKLCH	oklch(60.01% 0.191 276.3)
XYZ	xyz(26.6304, 20.2067, 84.1416)
Luminance	0.2021 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EEF #EFE766

analogous

#66B3EF #666EEF #A266EF

triadic

#666EEF #EF666E #6EEF66

tetradic

#666EEF #EF66B3 #EFE766 #66EFA2

square

#666EEF #EF66B3 #EFE766 #66EFA2

split-complementary

#666EEF #EFA266 #B3EF66

monochromatic

#151FC6 #2F39E9 #666EEF #9DA3F5 #D5D7FB

Accessibility & contrast

On white

4.17

#666EEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#666EEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EEF

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EEF	#FFFFFF	#000000	##000000
##666EEF	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1582F3

Deuteranopia (green-blind)

#0077EC

Tritanopia (blue-blind)

#028CA4

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666eef;
/* rgb */ color: rgb(102, 110, 239);
/* oklch */ color: oklch(60.0% 0.191 276.3);

Tailwind

colors: {
  custom: {
    50: '#9d97f5',
    500: '#666eef',
    950: '#000000',
  },
}

SCSS

$custom: #666eef;
$custom-light: #9d97f5;
$custom-dark: #000000;

JSON

{
  "hex": "#666eef",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 239
  },
  "hsl": {
    "h": 236.496,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.60012,
    "c": 0.19081,
    "h": 276.3
  },
  "luminance": 0.20209
}

Semantic roles & 50–950 ramp

primary

#666EEF

secondary

#EEECC2

accent

#D108DD

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666EEF

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

Preview Lab → · Contrast checker → · Palette generator →