#3661D1#3661D1

#3661D1 is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.7% C 0.180 H 264.9°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3661D1
RGB	rgb(54, 97, 209)
HSL	hsl(223, 63%, 52%)
HSV	hsv(223, 74%, 82%)
CMYK	cmyk(74.2%, 53.6%, 0%, 18%)
CIE-LAB	lab(44.14, 24.14, -62.16)
CIE-LCH	lch(44.14, 66.68, 291.22°)
OKLab	oklab(52.71% -0.0158 -0.1791)
OKLCH	oklch(52.71% 0.18 264.9)
XYZ	xyz(17.3006, 13.9352, 62.0872)
Luminance	0.1394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661D1 #D1A636

analogous

#36AFD1 #3661D1 #5936D1

triadic

#3661D1 #D13661 #61D136

tetradic

#3661D1 #D136AF #D1A636 #36D159

square

#3661D1 #D136AF #D1A636 #36D159

split-complementary

#3661D1 #D15936 #AFD136

monochromatic

#1A3372 #2649A4 #3661D1 #6888DC #9AAFE8

Accessibility & contrast

On white

5.54

#3661D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#3661D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661D1

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661D1	#FFFFFF	#000000	##FFFFFF
##3661D1	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0370D5

Deuteranopia (green-blind)

#0062CF

Tritanopia (blue-blind)

#007C8F

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3661d1;
/* rgb */ color: rgb(54, 97, 209);
/* oklch */ color: oklch(52.7% 0.180 264.9);

Tailwind

colors: {
  custom: {
    50: '#828de0',
    500: '#3661d1',
    950: '#000000',
  },
}

SCSS

$custom: #3661d1;
$custom-light: #828de0;
$custom-dark: #000000;

JSON

{
  "hex": "#3661d1",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 209
  },
  "hsl": {
    "h": 223.355,
    "s": 62.753,
    "l": 51.569
  },
  "oklch": {
    "l": 0.52712,
    "c": 0.17976,
    "h": 264.9
  },
  "luminance": 0.13937
}

Semantic roles & 50–950 ramp

primary

#3661D1

secondary

#D3C18F

accent

#B842E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3661D1

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

Preview Lab → · Contrast checker → · Palette generator →