#3658BB#3658BB

#3658BB is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.2% C 0.161 H 266.3°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#3658BB
RGB	rgb(54, 88, 187)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(71.1%, 52.9%, 0%, 26.7%)
CIE-LAB	lab(40.16, 21.83, -55.86)
CIE-LCH	lch(40.16, 59.98, 291.35°)
OKLab	oklab(49.21% -0.0105 -0.1607)
OKLCH	oklch(49.21% 0.161 266.3)
XYZ	xyz(13.9776, 11.3501, 48.4582)
Luminance	0.1135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3658BB #BB9936

analogous

#369ABB #3658BB #5736BB

triadic

#3658BB #BB3658 #58BB36

tetradic

#3658BB #BB369A #BB9936 #36BB57

square

#3658BB #BB369A #BB9936 #36BB57

split-complementary

#3658BB #BB5736 #9ABB36

monochromatic

#1B2B5C #28428C #3658BB #5E7BD0 #8DA2DE

Accessibility & contrast

On white

6.42

#3658BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3658BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3658BB

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3658BB	#FFFFFF	#000000	##FFFFFF
##3658BB	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1365BE

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3658bb;
/* rgb */ color: rgb(54, 88, 187);
/* oklch */ color: oklch(49.2% 0.161 266.3);

Tailwind

colors: {
  custom: {
    50: '#7e86d0',
    500: '#3658bb',
    950: '#000000',
  },
}

SCSS

$custom: #3658bb;
$custom-light: #7e86d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3658bb",
  "rgb": {
    "r": 54,
    "g": 88,
    "b": 187
  },
  "hsl": {
    "h": 224.662,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49209,
    "c": 0.16102,
    "h": 266.3
  },
  "luminance": 0.11352
}

Semantic roles & 50–950 ramp

primary

#3658BB

secondary

#C9B784

accent

#B849DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3658BB

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

Preview Lab → · Contrast checker → · Palette generator →