#666DBB#666DBB

#666DBB is a mid, moderate blue. Relative luminance 0.173; OKLCH L 56.5% C 0.120 H 277.9°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#666DBB
RGB	rgb(102, 109, 187)
HSL	hsl(235, 38%, 57%)
HSV	hsv(235, 45%, 73%)
CMYK	cmyk(45.5%, 41.7%, 0%, 26.7%)
CIE-LAB	lab(48.70, 18.11, -42.03)
CIE-LCH	lch(48.70, 45.77, 293.31°)
OKLab	oklab(56.46% 0.0166 -0.1188)
OKLCH	oklch(56.46% 0.12 277.9)
XYZ	xyz(19.9150, 17.3489, 49.3034)
Luminance	0.1735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DBB #BBB466

analogous

#6698BB #666DBB #8A66BB

triadic

#666DBB #BB666D #6DBB66

tetradic

#666DBB #BB6698 #BBB466 #66BB8A

square

#666DBB #BB6698 #BBB466 #66BB8A

split-complementary

#666DBB #BB8A66 #98BB66

monochromatic

#333973 #464D9E #666DBB #9095CE #BBBEE1

Accessibility & contrast

On white

4.70

#666DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#666DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666DBB

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DBB	#FFFFFF	#000000	##FFFFFF
##666DBB	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5077BE

Deuteranopia (green-blind)

#4971B9

Tritanopia (blue-blind)

#497D8B

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666dbb;
/* rgb */ color: rgb(102, 109, 187);
/* oklch */ color: oklch(56.5% 0.120 277.9);

Tailwind

colors: {
  custom: {
    50: '#9696d0',
    500: '#666dbb',
    950: '#000000',
  },
}

SCSS

$custom: #666dbb;
$custom-light: #9696d0;
$custom-dark: #000000;

JSON

{
  "hex": "#666dbb",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 187
  },
  "hsl": {
    "h": 235.059,
    "s": 38.462,
    "l": 56.667
  },
  "oklch": {
    "l": 0.5646,
    "c": 0.11993,
    "h": 277.9
  },
  "luminance": 0.1735
}

Semantic roles & 50–950 ramp

primary

#666DBB

secondary

#D0CDAD

accent

#C559CE

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666DBB

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

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