#3758BB#3758BB

#3758BB is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.3% C 0.161 H 266.6°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#3758BB
RGB	rgb(55, 88, 187)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(70.6%, 52.9%, 0%, 26.7%)
CIE-LAB	lab(40.21, 21.97, -55.79)
CIE-LCH	lch(40.21, 59.96, 291.50°)
OKLab	oklab(49.26% -0.0096 -0.1604)
OKLCH	oklch(49.26% 0.161 266.6)
XYZ	xyz(14.0318, 11.3781, 48.4608)
Luminance	0.1138 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758BB #BB9A37

analogous

#379ABB #3758BB #5837BB

triadic

#3758BB #BB3758 #58BB37

tetradic

#3758BB #BB379A #BB9A37 #37BB58

square

#3758BB #BB379A #BB9A37 #37BB58

split-complementary

#3758BB #BB5837 #9ABB37

monochromatic

#1B2B5C #29428C #3758BB #5F7BD0 #8EA2DE

Accessibility & contrast

On white

6.41

#3758BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3758BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758BB

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758BB	#FFFFFF	#000000	##FFFFFF
##3758BB	1.00	6.41	3.28	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.41	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: #3758bb;
/* rgb */ color: rgb(55, 88, 187);
/* oklch */ color: oklch(49.3% 0.161 266.6);

Tailwind

colors: {
  custom: {
    50: '#7e86d0',
    500: '#3758bb',
    950: '#000000',
  },
}

SCSS

$custom: #3758bb;
$custom-light: #7e86d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3758bb",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 187
  },
  "hsl": {
    "h": 225,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.49257,
    "c": 0.16072,
    "h": 266.6
  },
  "luminance": 0.1138
}

Semantic roles & 50–950 ramp

primary

#3758BB

secondary

#C9B885

accent

#B94ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3758BB

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

Preview Lab → · Contrast checker → · Palette generator →