#3661BF#3661BF

#3661BF is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.4% C 0.155 H 263.4°. Best body text is #FFFFFF at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#3661BF
RGB	rgb(54, 97, 191)
HSL	hsl(221, 56%, 48%)
HSV	hsv(221, 72%, 75%)
CMYK	cmyk(71.7%, 49.2%, 0%, 25.1%)
CIE-LAB	lab(42.90, 17.48, -53.77)
CIE-LCH	lch(42.90, 56.54, 288.01°)
OKLab	oklab(51.38% -0.0178 -0.1544)
OKLCH	oklch(51.38% 0.155 263.4)
XYZ	xyz(15.1967, 13.0936, 51.0065)
Luminance	0.1310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661BF #BF9436

analogous

#36A5BF #3661BF #5036BF

triadic

#3661BF #BF3661 #61BF36

tetradic

#3661BF #BF36A5 #BF9436 #36BF50

square

#3661BF #BF36A5 #BF9436 #36BF50

split-complementary

#3661BF #BF5036 #A5BF36

monochromatic

#1B3160 #29498F #3661BF #6084D2 #90A9E0

Accessibility & contrast

On white

5.80

#3661BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.62

#3661BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661BF

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661BF	#FFFFFF	#000000	##FFFFFF
##3661BF	1.00	5.80	3.62	5.80
#FFFFFF	5.80	1.00	21.00	1.00
#000000	3.62	21.00	1.00	21.00
##FFFFFF	5.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C6CC2

Deuteranopia (green-blind)

#005FBD

Tritanopia (blue-blind)

#007787

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3661bf;
/* rgb */ color: rgb(54, 97, 191);
/* oklch */ color: oklch(51.4% 0.155 263.4);

Tailwind

colors: {
  custom: {
    50: '#7e8dd3',
    500: '#3661bf',
    950: '#000000',
  },
}

SCSS

$custom: #3661bf;
$custom-light: #7e8dd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3661bf",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 191
  },
  "hsl": {
    "h": 221.168,
    "s": 55.918,
    "l": 48.039
  },
  "oklch": {
    "l": 0.5138,
    "c": 0.15539,
    "h": 263.4
  },
  "luminance": 0.13095
}

Semantic roles & 50–950 ramp

primary

#3661BF

secondary

#CAB587

accent

#B049DF

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3661BF

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

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