#666FCA#666FCA

#666FCA is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.8% C 0.139 H 276.9°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#666FCA
RGB	rgb(102, 111, 202)
HSL	hsl(235, 49%, 60%)
HSV	hsv(235, 50%, 79%)
CMYK	cmyk(49.5%, 45%, 0%, 20.8%)
CIE-LAB	lab(50.05, 21.48, -48.51)
CIE-LCH	lch(50.05, 53.06, 293.89°)
OKLab	oklab(57.76% 0.0166 -0.1377)
OKLCH	oklch(57.76% 0.139 276.9)
XYZ	xyz(21.8213, 18.4567, 58.2783)
Luminance	0.1846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FCA #CAC166

analogous

#66A1CA #666FCA #8F66CA

triadic

#666FCA #CA666F #6FCA66

tetradic

#666FCA #CA66A1 #CAC166 #66CA8F

square

#666FCA #CA66A1 #CAC166 #66CA8F

split-complementary

#666FCA #CA8F66 #A1CA66

monochromatic

#2F3787 #3E49B4 #666FCA #939ADA #C1C5E9

Accessibility & contrast

On white

4.48

#666FCA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#666FCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FCA

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FCA	#FFFFFF	#000000	##000000
##666FCA	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#497BCD

Deuteranopia (green-blind)

#4073C8

Tritanopia (blue-blind)

#3F8293

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666fca;
/* rgb */ color: rgb(102, 111, 202);
/* oklch */ color: oklch(57.8% 0.139 276.9);

Tailwind

colors: {
  custom: {
    50: '#9898da',
    500: '#666fca',
    950: '#000000',
  },
}

SCSS

$custom: #666fca;
$custom-light: #9898da;
$custom-dark: #000000;

JSON

{
  "hex": "#666fca",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 202
  },
  "hsl": {
    "h": 234.6,
    "s": 48.544,
    "l": 59.608
  },
  "oklch": {
    "l": 0.57756,
    "c": 0.13874,
    "h": 276.9
  },
  "luminance": 0.18458
}

Semantic roles & 50–950 ramp

primary

#666FCA

secondary

#D9D6B2

accent

#CC50D8

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666FCA

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

Preview Lab → · Contrast checker → · Palette generator →