#666EBF#666EBF

#666EBF is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.9% C 0.124 H 277.4°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#666EBF
RGB	rgb(102, 110, 191)
HSL	hsl(235, 41%, 57%)
HSV	hsv(235, 47%, 75%)
CMYK	cmyk(46.6%, 42.4%, 0%, 25.1%)
CIE-LAB	lab(49.18, 18.71, -43.58)
CIE-LCH	lch(49.18, 47.43, 293.23°)
OKLab	oklab(56.9% 0.016 -0.1233)
OKLCH	oklch(56.9% 0.124 277.4)
XYZ	xyz(20.4565, 17.7372, 51.6258)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EBF #BFB766

analogous

#669ABF #666EBF #8B66BF

triadic

#666EBF #BF666E #6EBF66

tetradic

#666EBF #BF669A #BFB766 #66BF8B

square

#666EBF #BF669A #BFB766 #66BF8B

split-complementary

#666EBF #BF8B66 #9ABF66

monochromatic

#323978 #444DA3 #666EBF #9197D1 #BCC0E3

Accessibility & contrast

On white

4.62

#666EBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#666EBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666EBF

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EBF	#FFFFFF	#000000	##FFFFFF
##666EBF	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F79C2

Deuteranopia (green-blind)

#4872BD

Tritanopia (blue-blind)

#467F8D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ebf;
/* rgb */ color: rgb(102, 110, 191);
/* oklch */ color: oklch(56.9% 0.124 277.4);

Tailwind

colors: {
  custom: {
    50: '#9697d3',
    500: '#666ebf',
    950: '#000000',
  },
}

SCSS

$custom: #666ebf;
$custom-light: #9697d3;
$custom-dark: #000000;

JSON

{
  "hex": "#666ebf",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 191
  },
  "hsl": {
    "h": 234.607,
    "s": 41.014,
    "l": 57.451
  },
  "oklch": {
    "l": 0.56896,
    "c": 0.12434,
    "h": 277.4
  },
  "luminance": 0.17738
}

Semantic roles & 50–950 ramp

primary

#666EBF

secondary

#D2CFAE

accent

#C657D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666EBF

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

Preview Lab → · Contrast checker → · Palette generator →