#3758B9#3758B9

#3758B9 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.1% C 0.158 H 266.4°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#3758B9
RGB	rgb(55, 88, 185)
HSL	hsl(225, 54%, 47%)
HSV	hsv(225, 70%, 73%)
CMYK	cmyk(70.3%, 52.4%, 0%, 27.5%)
CIE-LAB	lab(40.07, 21.24, -54.84)
CIE-LCH	lch(40.07, 58.81, 291.17°)
OKLab	oklab(49.11% -0.0098 -0.1577)
OKLCH	oklch(49.11% 0.158 266.4)
XYZ	xyz(13.8192, 11.2931, 47.3410)
Luminance	0.1129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758B9 #B99837

analogous

#3799B9 #3758B9 #5737B9

triadic

#3758B9 #B93758 #58B937

tetradic

#3758B9 #B93799 #B99837 #37B957

square

#3758B9 #B93799 #B99837 #37B957

split-complementary

#3758B9 #B95737 #99B937

monochromatic

#1B2B5B #29428A #3758B9 #5E7BCF #8DA2DD

Accessibility & contrast

On white

6.44

#3758B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#3758B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758B9

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758B9	#FFFFFF	#000000	##FFFFFF
##3758B9	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1865BC

Deuteranopia (green-blind)

#0059B7

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3758b9;
/* rgb */ color: rgb(55, 88, 185);
/* oklch */ color: oklch(49.1% 0.158 266.4);

Tailwind

colors: {
  custom: {
    50: '#7e86cf',
    500: '#3758b9',
    950: '#000000',
  },
}

SCSS

$custom: #3758b9;
$custom-light: #7e86cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3758b9",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 185
  },
  "hsl": {
    "h": 224.769,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.49106,
    "c": 0.15797,
    "h": 266.4
  },
  "luminance": 0.11294
}

Semantic roles & 50–950 ramp

primary

#3758B9

secondary

#C8B784

accent

#B84ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3758B9

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

Preview Lab → · Contrast checker → · Palette generator →