#3661BA#3661BA

#3661BA is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.0% C 0.149 H 262.9°. Best body text is #FFFFFF at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#3661BA
RGB	rgb(54, 97, 186)
HSL	hsl(220, 55%, 47%)
HSV	hsv(220, 71%, 73%)
CMYK	cmyk(71%, 47.8%, 0%, 27.1%)
CIE-LAB	lab(42.58, 15.63, -51.39)
CIE-LCH	lch(42.58, 53.71, 286.92°)
OKLab	oklab(51.03% -0.0185 -0.1474)
OKLCH	oklch(51.03% 0.149 262.9)
XYZ	xyz(14.6558, 12.8773, 48.1580)
Luminance	0.1288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661BA #BA8F36

analogous

#36A3BA #3661BA #4D36BA

triadic

#3661BA #BA3661 #61BA36

tetradic

#3661BA #BA36A3 #BA8F36 #36BA4D

square

#3661BA #BA36A3 #BA8F36 #36BA4D

split-complementary

#3661BA #BA4D36 #A3BA36

monochromatic

#1A305B #28488B #3661BA #5D83D0 #8DA7DE

Accessibility & contrast

On white

5.87

#3661BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#3661BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661BA

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661BA	#FFFFFF	#000000	##FFFFFF
##3661BA	1.00	5.87	3.58	5.87
#FFFFFF	5.87	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316BBD

Deuteranopia (green-blind)

#0E5FB8

Tritanopia (blue-blind)

#007684

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3661ba;
/* rgb */ color: rgb(54, 97, 186);
/* oklch */ color: oklch(51.0% 0.149 262.9);

Tailwind

colors: {
  custom: {
    50: '#7d8dcf',
    500: '#3661ba',
    950: '#000000',
  },
}

SCSS

$custom: #3661ba;
$custom-light: #7d8dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3661ba",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 186
  },
  "hsl": {
    "h": 220.455,
    "s": 55,
    "l": 47.059
  },
  "oklch": {
    "l": 0.51026,
    "c": 0.14851,
    "h": 262.9
  },
  "luminance": 0.12879
}

Semantic roles & 50–950 ramp

primary

#3661BA

secondary

#C8B284

accent

#AE49DE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3661BA

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

Preview Lab → · Contrast checker → · Palette generator →