#666BA6#666BA6

#666BA6 is a mid, moderate blue. Relative luminance 0.161; OKLCH L 54.9% C 0.092 H 279.2°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#666BA6
RGB	rgb(102, 107, 166)
HSL	hsl(235, 26%, 53%)
HSV	hsv(235, 39%, 65%)
CMYK	cmyk(38.6%, 35.5%, 0%, 34.9%)
CIE-LAB	lab(47.10, 13.12, -32.33)
CIE-LCH	lch(47.10, 34.89, 292.09°)
OKLab	oklab(54.89% 0.0147 -0.0905)
OKLCH	oklch(54.89% 0.092 279.2)
XYZ	xyz(17.6181, 16.0927, 38.2469)
Luminance	0.1609 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BA6 #A6A166

analogous

#668BA6 #666BA6 #8166A6

triadic

#666BA6 #A6666B #6BA666

tetradic

#666BA6 #A6668B #A6A166 #66A681

square

#666BA6 #A6668B #A6A166 #66A681

split-complementary

#666BA6 #A68166 #8BA666

monochromatic

#36395C #4C5083 #666BA6 #8D90BD #B3B6D3

Accessibility & contrast

On white

4.98

#666BA6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#666BA6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BA6

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BA6	#FFFFFF	#000000	##FFFFFF
##666BA6	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5872A8

Deuteranopia (green-blind)

#546DA5

Tritanopia (blue-blind)

#537681

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ba6;
/* rgb */ color: rgb(102, 107, 166);
/* oklch */ color: oklch(54.9% 0.092 279.2);

Tailwind

colors: {
  custom: {
    50: '#9495c0',
    500: '#666ba6',
    950: '#000000',
  },
}

SCSS

$custom: #666ba6;
$custom-light: #9495c0;
$custom-dark: #000000;

JSON

{
  "hex": "#666ba6",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 166
  },
  "hsl": {
    "h": 235.313,
    "s": 26.446,
    "l": 52.549
  },
  "oklch": {
    "l": 0.54885,
    "c": 0.09172,
    "h": 279.2
  },
  "luminance": 0.16093
}

Semantic roles & 50–950 ramp

primary

#666BA6

secondary

#C2C0A6

accent

#BB65C3

background

#F9F9FB

surface

#F2F1F7

border

#CCCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666BA6

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

Preview Lab → · Contrast checker → · Palette generator →