#666DD5#666DD5

#666DD5 is a mid, vivid blue. Relative luminance 0.186; OKLCH L 58.1% C 0.157 H 277.4°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#666DD5
RGB	rgb(102, 109, 213)
HSL	hsl(236, 57%, 62%)
HSV	hsv(236, 52%, 84%)
CMYK	cmyk(52.1%, 48.8%, 0%, 16.5%)
CIE-LAB	lab(50.17, 26.14, -54.58)
CIE-LCH	lch(50.17, 60.51, 295.59°)
OKLab	oklab(58.06% 0.0203 -0.1556)
OKLCH	oklch(58.06% 0.157 277.4)
XYZ	xyz(22.9546, 18.5647, 65.3117)
Luminance	0.1857 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DD5 #D5CE66

analogous

#66A5D5 #666DD5 #9766D5

triadic

#666DD5 #D5666D #6DD566

tetradic

#666DD5 #D566A5 #D5CE66 #66D597

square

#666DD5 #D566A5 #D5CE66 #66D597

split-complementary

#666DD5 #D59766 #A5D566

monochromatic

#293097 #3740C7 #666DD5 #969BE2 #C6C9EF

Accessibility & contrast

On white

4.46

#666DD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#666DD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DD5

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DD5	#FFFFFF	#000000	##000000
##666DD5	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C7CD9

Deuteranopia (green-blind)

#2F73D3

Tritanopia (blue-blind)

#358497

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666dd5;
/* rgb */ color: rgb(102, 109, 213);
/* oklch */ color: oklch(58.1% 0.157 277.4);

Tailwind

colors: {
  custom: {
    50: '#9996e2',
    500: '#666dd5',
    950: '#000000',
  },
}

SCSS

$custom: #666dd5;
$custom-light: #9996e2;
$custom-dark: #000000;

JSON

{
  "hex": "#666dd5",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 213
  },
  "hsl": {
    "h": 236.216,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.58061,
    "c": 0.15688,
    "h": 277.4
  },
  "luminance": 0.18566
}

Semantic roles & 50–950 ramp

primary

#666DD5

secondary

#E0DDB7

accent

#BA21C4

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666DD5

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

Preview Lab → · Contrast checker → · Palette generator →