#3659BB#3659BB

#3659BB is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.4% C 0.160 H 265.9°. Best body text is #FFFFFF at 6.36:1 contrast (WCAG AA passes).

Color values

HEX	#3659BB
RGB	rgb(54, 89, 187)
HSL	hsl(224, 55%, 47%)
HSV	hsv(224, 71%, 73%)
CMYK	cmyk(71.1%, 52.4%, 0%, 26.7%)
CIE-LAB	lab(40.44, 21.18, -55.42)
CIE-LCH	lch(40.44, 59.33, 290.91°)
OKLab	oklab(49.42% -0.0114 -0.1594)
OKLCH	oklch(49.42% 0.16 265.9)
XYZ	xyz(14.0602, 11.5154, 48.4858)
Luminance	0.1152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3659BB #BB9836

analogous

#369BBB #3659BB #5636BB

triadic

#3659BB #BB3659 #59BB36

tetradic

#3659BB #BB369B #BB9836 #36BB56

square

#3659BB #BB369B #BB9836 #36BB56

split-complementary

#3659BB #BB5636 #9BBB36

monochromatic

#1B2C5C #28428C #3659BB #5E7CD0 #8DA3DE

Accessibility & contrast

On white

6.36

#3659BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#3659BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3659BB

6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3659BB	#FFFFFF	#000000	##FFFFFF
##3659BB	1.00	6.36	3.30	6.36
#FFFFFF	6.36	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1866BE

Deuteranopia (green-blind)

#005AB9

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3659bb;
/* rgb */ color: rgb(54, 89, 187);
/* oklch */ color: oklch(49.4% 0.160 265.9);

Tailwind

colors: {
  custom: {
    50: '#7e87d0',
    500: '#3659bb',
    950: '#000000',
  },
}

SCSS

$custom: #3659bb;
$custom-light: #7e87d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3659bb",
  "rgb": {
    "r": 54,
    "g": 89,
    "b": 187
  },
  "hsl": {
    "h": 224.211,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49415,
    "c": 0.15977,
    "h": 265.9
  },
  "luminance": 0.11517
}

Semantic roles & 50–950 ramp

primary

#3659BB

secondary

#C9B784

accent

#B749DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3659BB

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

Preview Lab → · Contrast checker → · Palette generator →