#3666AE#3666AE

#3666AE is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.3% C 0.126 H 258.4°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#3666AE
RGB	rgb(54, 102, 174)
HSL	hsl(216, 53%, 45%)
HSV	hsv(216, 69%, 68%)
CMYK	cmyk(69%, 41.4%, 0%, 31.8%)
CIE-LAB	lab(43.27, 8.00, -43.25)
CIE-LCH	lch(43.27, 43.99, 280.48°)
OKLab	oklab(51.33% -0.0254 -0.1234)
OKLCH	oklch(51.33% 0.126 258.4)
XYZ	xyz(13.9099, 13.3416, 41.8783)
Luminance	0.1334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3666AE #AE7E36

analogous

#36A2AE #3666AE #4236AE

triadic

#3666AE #AE3666 #66AE36

tetradic

#3666AE #AE36A2 #AE7E36 #36AE42

square

#3666AE #AE36A2 #AE7E36 #36AE42

split-complementary

#3666AE #AE4236 #A2AE36

monochromatic

#192F51 #284B7F #3666AE #5685CB #85A7D9

Accessibility & contrast

On white

5.72

#3666AE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3666AE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3666AE

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3666AE	#FFFFFF	#000000	##FFFFFF
##3666AE	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#456CB1

Deuteranopia (green-blind)

#3261AD

Tritanopia (blue-blind)

#007781

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3666ae;
/* rgb */ color: rgb(54, 102, 174);
/* oklch */ color: oklch(51.3% 0.126 258.4);

Tailwind

colors: {
  custom: {
    50: '#7b91c6',
    500: '#3666ae',
    950: '#000000',
  },
}

SCSS

$custom: #3666ae;
$custom-light: #7b91c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3666ae",
  "rgb": {
    "r": 54,
    "g": 102,
    "b": 174
  },
  "hsl": {
    "h": 216,
    "s": 52.632,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51325,
    "c": 0.12595,
    "h": 258.4
  },
  "luminance": 0.13343
}

Semantic roles & 50–950 ramp

primary

#3666AE

secondary

#C3A77D

accent

#A24CDC

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3666AE

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

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