#3758B8#3758B8

#3758B8 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.0% C 0.157 H 266.4°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#3758B8
RGB	rgb(55, 88, 184)
HSL	hsl(225, 54%, 47%)
HSV	hsv(225, 70%, 72%)
CMYK	cmyk(70.1%, 52.2%, 0%, 27.8%)
CIE-LAB	lab(40.00, 20.87, -54.37)
CIE-LCH	lch(40.00, 58.24, 291.00°)
OKLab	oklab(49.03% -0.0099 -0.1563)
OKLCH	oklch(49.03% 0.157 266.4)
XYZ	xyz(13.7140, 11.2510, 46.7870)
Luminance	0.1125 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758B8 #B89737

analogous

#3799B8 #3758B8 #5737B8

triadic

#3758B8 #B83758 #58B837

tetradic

#3758B8 #B83799 #B89737 #37B857

square

#3758B8 #B83799 #B89737 #37B857

split-complementary

#3758B8 #B85737 #99B837

monochromatic

#1B2B5A #294189 #3758B8 #5D7ACF #8DA1DD

Accessibility & contrast

On white

6.46

#3758B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#3758B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758B8

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758B8	#FFFFFF	#000000	##FFFFFF
##3758B8	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A64BB

Deuteranopia (green-blind)

#0059B6

Tritanopia (blue-blind)

#006F7F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3758b8;
/* rgb */ color: rgb(55, 88, 184);
/* oklch */ color: oklch(49.0% 0.157 266.4);

Tailwind

colors: {
  custom: {
    50: '#7e86ce',
    500: '#3758b8',
    950: '#000000',
  },
}

SCSS

$custom: #3758b8;
$custom-light: #7e86ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3758b8",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 184
  },
  "hsl": {
    "h": 224.651,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.49031,
    "c": 0.15658,
    "h": 266.4
  },
  "luminance": 0.11252
}

Semantic roles & 50–950 ramp

primary

#3758B8

secondary

#C7B684

accent

#B84ADD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3758B8

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

Preview Lab → · Contrast checker → · Palette generator →