#666EF0#666EF0

#666EF0 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 60.1% C 0.192 H 276.3°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#666EF0
RGB	rgb(102, 110, 240)
HSL	hsl(237, 82%, 67%)
HSV	hsv(237, 58%, 94%)
CMYK	cmyk(57.5%, 54.2%, 0%, 5.9%)
CIE-LAB	lab(52.14, 34.09, -66.62)
CIE-LCH	lch(52.14, 74.84, 297.10°)
OKLab	oklab(60.08% 0.0211 -0.191)
OKLCH	oklch(60.08% 0.192 276.3)
XYZ	xyz(26.7785, 20.2660, 84.9218)
Luminance	0.2027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EF0 #F0E866

analogous

#66B3F0 #666EF0 #A366F0

triadic

#666EF0 #F0666E #6EF066

tetradic

#666EF0 #F066B3 #F0E866 #66F0A3

square

#666EF0 #F066B3 #F0E866 #66F0A3

split-complementary

#666EF0 #F0A366 #B3F066

monochromatic

#141EC8 #2E39EB #666EF0 #9EA3F5 #D5D8FB

Accessibility & contrast

On white

4.16

#666EF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#666EF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EF0

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EF0	#FFFFFF	#000000	##000000
##666EF0	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1282F4

Deuteranopia (green-blind)

#0077ED

Tritanopia (blue-blind)

#008CA4

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666ef0;
/* rgb */ color: rgb(102, 110, 240);
/* oklch */ color: oklch(60.1% 0.192 276.3);

Tailwind

colors: {
  custom: {
    50: '#9d97f6',
    500: '#666ef0',
    950: '#000000',
  },
}

SCSS

$custom: #666ef0;
$custom-light: #9d97f6;
$custom-dark: #000000;

JSON

{
  "hex": "#666ef0",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 240
  },
  "hsl": {
    "h": 236.522,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.60083,
    "c": 0.19213,
    "h": 276.3
  },
  "luminance": 0.20268
}

Semantic roles & 50–950 ramp

primary

#666EF0

secondary

#EFECC3

accent

#D207DF

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666EF0

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

Preview Lab → · Contrast checker → · Palette generator →