#666EA5#666EA5

#666EA5 is a mid, moderate blue. Relative luminance 0.167; OKLCH L 55.5% C 0.086 H 276.9°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#666EA5
RGB	rgb(102, 110, 165)
HSL	hsl(232, 26%, 52%)
HSV	hsv(232, 38%, 65%)
CMYK	cmyk(38.2%, 33.3%, 0%, 35.3%)
CIE-LAB	lab(47.87, 11.00, -30.53)
CIE-LCH	lch(47.87, 32.45, 289.82°)
OKLab	oklab(55.47% 0.0103 -0.0853)
OKLCH	oklch(55.47% 0.086 276.9)
XYZ	xyz(17.8450, 16.6925, 37.8717)
Luminance	0.1669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EA5 #A59D66

analogous

#668EA5 #666EA5 #7E66A5

triadic

#666EA5 #A5666E #6EA566

tetradic

#666EA5 #A5668E #A59D66 #66A57E

square

#666EA5 #A5668E #A59D66 #66A57E

split-complementary

#666EA5 #A57E66 #8EA566

monochromatic

#363A5B #4C5382 #666EA5 #8D93BC #B3B7D2

Accessibility & contrast

On white

4.84

#666EA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#666EA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666EA5

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EA5	#FFFFFF	#000000	##FFFFFF
##666EA5	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C74A7

Deuteranopia (green-blind)

#586FA4

Tritanopia (blue-blind)

#547982

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666ea5;
/* rgb */ color: rgb(102, 110, 165);
/* oklch */ color: oklch(55.5% 0.086 276.9);

Tailwind

colors: {
  custom: {
    50: '#9497c0',
    500: '#666ea5',
    950: '#000000',
  },
}

SCSS

$custom: #666ea5;
$custom-light: #9497c0;
$custom-dark: #000000;

JSON

{
  "hex": "#666ea5",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 165
  },
  "hsl": {
    "h": 232.381,
    "s": 25.926,
    "l": 52.353
  },
  "oklch": {
    "l": 0.55467,
    "c": 0.08596,
    "h": 276.9
  },
  "luminance": 0.16693
}

Semantic roles & 50–950 ramp

primary

#666EA5

secondary

#C1BEA6

accent

#B765C2

background

#F9F9FB

surface

#F2F2F7

border

#CCCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666EA5

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

Preview Lab → · Contrast checker → · Palette generator →