#666EE1#666EE1

#666EE1 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.0% C 0.172 H 276.8°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#666EE1
RGB	rgb(102, 110, 225)
HSL	hsl(236, 67%, 64%)
HSV	hsv(236, 55%, 88%)
CMYK	cmyk(54.7%, 51.1%, 0%, 11.8%)
CIE-LAB	lab(51.16, 29.32, -59.78)
CIE-LCH	lch(51.16, 66.58, 296.13°)
OKLab	oklab(59.05% 0.0203 -0.1708)
OKLCH	oklch(59.05% 0.172 276.8)
XYZ	xyz(24.6417, 19.4112, 73.6678)
Luminance	0.1941 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EE1 #E1D966

analogous

#66ABE1 #666EE1 #9C66E1

triadic

#666EE1 #E1666E #6EE166

tetradic

#666EE1 #E166AB #E1D966 #66E19C

square

#666EE1 #E166AB #E1D966 #66E19C

split-complementary

#666EE1 #E19C66 #ABE166

monochromatic

#222AAB #333ED7 #666EE1 #999EEB #CCCFF5

Accessibility & contrast

On white

4.30

#666EE1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#666EE1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EE1

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EE1	#FFFFFF	#000000	##000000
##666EE1	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#307FE5

Deuteranopia (green-blind)

#1C75DF

Tritanopia (blue-blind)

#27889D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666ee1;
/* rgb */ color: rgb(102, 110, 225);
/* oklch */ color: oklch(59.0% 0.172 276.8);

Tailwind

colors: {
  custom: {
    50: '#9b97eb',
    500: '#666ee1',
    950: '#000000',
  },
}

SCSS

$custom: #666ee1;
$custom-light: #9b97eb;
$custom-dark: #000000;

JSON

{
  "hex": "#666ee1",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 225
  },
  "hsl": {
    "h": 236.098,
    "s": 67.213,
    "l": 64.118
  },
  "oklch": {
    "l": 0.59045,
    "c": 0.17203,
    "h": 276.8
  },
  "luminance": 0.19413
}

Semantic roles & 50–950 ramp

primary

#666EE1

secondary

#E7E4BC

accent

#C316CF

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666EE1

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

Preview Lab → · Contrast checker → · Palette generator →