#666FEB#666FEB

#666FEB is a mid, vivid blue. Relative luminance 0.202; OKLCH L 59.9% C 0.184 H 276.2°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#666FEB
RGB	rgb(102, 111, 235)
HSL	hsl(236, 77%, 66%)
HSV	hsv(236, 57%, 92%)
CMYK	cmyk(56.6%, 52.8%, 0%, 7.8%)
CIE-LAB	lab(52.05, 31.89, -63.96)
CIE-LCH	lch(52.05, 71.47, 296.50°)
OKLab	oklab(59.92% 0.0199 -0.1831)
OKLCH	oklch(59.92% 0.184 276.2)
XYZ	xyz(26.1545, 20.1899, 81.1000)
Luminance	0.2019 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FEB #EBE266

analogous

#66B1EB #666FEB #9F66EB

triadic

#666FEB #EB666F #6FEB66

tetradic

#666FEB #EB66B1 #EBE266 #66EB9F

square

#666FEB #EB66B1 #EBE266 #66EB9F

split-complementary

#666FEB #EB9F66 #B1EB66

monochromatic

#1924BE #303CE4 #666FEB #9CA2F2 #D2D5F9

Accessibility & contrast

On white

4.17

#666FEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#666FEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FEB

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FEB	#FFFFFF	#000000	##000000
##666FEB	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2482EF

Deuteranopia (green-blind)

#0077E8

Tritanopia (blue-blind)

#128BA2

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666feb;
/* rgb */ color: rgb(102, 111, 235);
/* oklch */ color: oklch(59.9% 0.184 276.2);

Tailwind

colors: {
  custom: {
    50: '#9c98f2',
    500: '#666feb',
    950: '#000000',
  },
}

SCSS

$custom: #666feb;
$custom-light: #9c98f2;
$custom-dark: #000000;

JSON

{
  "hex": "#666feb",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 235
  },
  "hsl": {
    "h": 235.94,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.59915,
    "c": 0.18422,
    "h": 276.2
  },
  "luminance": 0.20192
}

Semantic roles & 50–950 ramp

primary

#666FEB

secondary

#ECE9C1

accent

#CB0CD9

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666FEB

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

Preview Lab → · Contrast checker → · Palette generator →