#666ECB#666ECB

#666ECB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.6% C 0.142 H 277.3°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#666ECB
RGB	rgb(102, 110, 203)
HSL	hsl(235, 49%, 60%)
HSV	hsv(235, 50%, 80%)
CMYK	cmyk(49.8%, 45.8%, 0%, 20.4%)
CIE-LAB	lab(49.84, 22.41, -49.41)
CIE-LCH	lch(49.84, 54.25, 294.39°)
OKLab	oklab(57.62% 0.0179 -0.1404)
OKLCH	oklch(57.62% 0.142 277.3)
XYZ	xyz(21.8316, 18.2872, 58.8677)
Luminance	0.1829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ECB #CBC366

analogous

#66A0CB #666ECB #9166CB

triadic

#666ECB #CB666E #6ECB66

tetradic

#666ECB #CB66A0 #CBC366 #66CB91

square

#666ECB #CB66A0 #CBC366 #66CB91

split-complementary

#666ECB #CB9166 #A0CB66

monochromatic

#2E3588 #3E47B6 #666ECB #9499DB #C1C5EA

Accessibility & contrast

On white

4.51

#666ECB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#666ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666ECB

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ECB	#FFFFFF	#000000	##000000
##666ECB	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467BCE

Deuteranopia (green-blind)

#3D73C9

Tritanopia (blue-blind)

#3E8293

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666ecb;
/* rgb */ color: rgb(102, 110, 203);
/* oklch */ color: oklch(57.6% 0.142 277.3);

Tailwind

colors: {
  custom: {
    50: '#9897db',
    500: '#666ecb',
    950: '#000000',
  },
}

SCSS

$custom: #666ecb;
$custom-light: #9897db;
$custom-dark: #000000;

JSON

{
  "hex": "#666ecb",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 203
  },
  "hsl": {
    "h": 235.248,
    "s": 49.268,
    "l": 59.804
  },
  "oklch": {
    "l": 0.5762,
    "c": 0.14151,
    "h": 277.3
  },
  "luminance": 0.18288
}

Semantic roles & 50–950 ramp

primary

#666ECB

secondary

#DAD7B3

accent

#CE4FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666ECB

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

Preview Lab → · Contrast checker → · Palette generator →