#3755BB#3755BB

#3755BB is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.6% C 0.164 H 267.5°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#3755BB
RGB	rgb(55, 85, 187)
HSL	hsl(226, 55%, 47%)
HSV	hsv(226, 71%, 73%)
CMYK	cmyk(70.6%, 54.5%, 0%, 26.7%)
CIE-LAB	lab(39.40, 23.92, -57.09)
CIE-LCH	lch(39.40, 61.90, 292.74°)
OKLab	oklab(48.65% -0.0071 -0.1643)
OKLCH	oklch(48.65% 0.164 267.5)
XYZ	xyz(13.7906, 10.8957, 48.3804)
Luminance	0.1090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3755BB #BB9D37

analogous

#3797BB #3755BB #5B37BB

triadic

#3755BB #BB3755 #55BB37

tetradic

#3755BB #BB3797 #BB9D37 #37BB5B

square

#3755BB #BB3797 #BB9D37 #37BB5B

split-complementary

#3755BB #BB5B37 #97BB37

monochromatic

#1B2A5C #29408C #3755BB #5F79D0 #8EA1DE

Accessibility & contrast

On white

6.61

#3755BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3755BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3755BB

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3755BB	#FFFFFF	#000000	##FFFFFF
##3755BB	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063BF

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3755bb;
/* rgb */ color: rgb(55, 85, 187);
/* oklch */ color: oklch(48.6% 0.164 267.5);

Tailwind

colors: {
  custom: {
    50: '#7e84d0',
    500: '#3755bb',
    950: '#000000',
  },
}

SCSS

$custom: #3755bb;
$custom-light: #7e84d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3755bb",
  "rgb": {
    "r": 55,
    "g": 85,
    "b": 187
  },
  "hsl": {
    "h": 226.364,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.48648,
    "c": 0.16447,
    "h": 267.5
  },
  "luminance": 0.10897
}

Semantic roles & 50–950 ramp

primary

#3755BB

secondary

#C9B985

accent

#BC4ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3755BB

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

Preview Lab → · Contrast checker → · Palette generator →