#666DBF#666DBF

#666DBF is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.7% C 0.126 H 277.9°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#666DBF
RGB	rgb(102, 109, 191)
HSL	hsl(235, 41%, 57%)
HSV	hsv(235, 47%, 75%)
CMYK	cmyk(46.6%, 42.9%, 0%, 25.1%)
CIE-LAB	lab(48.91, 19.32, -44.00)
CIE-LCH	lch(48.91, 48.06, 293.71°)
OKLab	oklab(56.69% 0.0173 -0.1245)
OKLCH	oklch(56.69% 0.126 277.9)
XYZ	xyz(20.3492, 17.5226, 51.5901)
Luminance	0.1752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DBF #BFB866

analogous

#6699BF #666DBF #8C66BF

triadic

#666DBF #BF666D #6DBF66

tetradic

#666DBF #BF6699 #BFB866 #66BF8C

square

#666DBF #BF6699 #BFB866 #66BF8C

split-complementary

#666DBF #BF8C66 #99BF66

monochromatic

#323878 #444CA3 #666DBF #9196D1 #BCBFE3

Accessibility & contrast

On white

4.66

#666DBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#666DBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666DBF

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DBF	#FFFFFF	#000000	##FFFFFF
##666DBF	1.00	4.66	4.50	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D78C2

Deuteranopia (green-blind)

#4671BD

Tritanopia (blue-blind)

#467E8D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666dbf;
/* rgb */ color: rgb(102, 109, 191);
/* oklch */ color: oklch(56.7% 0.126 277.9);

Tailwind

colors: {
  custom: {
    50: '#9696d3',
    500: '#666dbf',
    950: '#000000',
  },
}

SCSS

$custom: #666dbf;
$custom-light: #9696d3;
$custom-dark: #000000;

JSON

{
  "hex": "#666dbf",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 191
  },
  "hsl": {
    "h": 235.281,
    "s": 41.014,
    "l": 57.451
  },
  "oklch": {
    "l": 0.56695,
    "c": 0.12573,
    "h": 277.9
  },
  "luminance": 0.17524
}

Semantic roles & 50–950 ramp

primary

#666DBF

secondary

#D2D0AE

accent

#C757D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666DBF

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

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