#3758D9#3758D9

#3758D9 is a mid, highly saturated blue. Relative luminance 0.128; OKLCH L 51.7% C 0.201 H 267.6°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#3758D9
RGB	rgb(55, 88, 217)
HSL	hsl(228, 68%, 53%)
HSV	hsv(228, 75%, 85%)
CMYK	cmyk(74.7%, 59.4%, 0%, 14.9%)
CIE-LAB	lab(42.46, 32.93, -69.47)
CIE-LCH	lch(42.46, 76.88, 295.36°)
OKLab	oklab(51.65% -0.0082 -0.2006)
OKLCH	oklch(51.65% 0.201 267.6)
XYZ	xyz(17.5853, 12.7995, 67.1759)
Luminance	0.1280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758D9 #D9B837

analogous

#37A9D9 #3758D9 #6737D9

triadic

#3758D9 #D93758 #58D937

tetradic

#3758D9 #D937A9 #D9B837 #37D967

square

#3758D9 #D937A9 #D9B837 #37D967

split-complementary

#3758D9 #D96737 #A9D937

monochromatic

#182D7E #223FB1 #3758D9 #6A83E3 #9EAEED

Accessibility & contrast

On white

5.90

#3758D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3758D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758D9

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758D9	#FFFFFF	#000000	##FFFFFF
##3758D9	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDD

Deuteranopia (green-blind)

#005DD7

Tritanopia (blue-blind)

#007990

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3758d9;
/* rgb */ color: rgb(55, 88, 217);
/* oklch */ color: oklch(51.7% 0.201 267.6);

Tailwind

colors: {
  custom: {
    50: '#8586e6',
    500: '#3758d9',
    950: '#000000',
  },
}

SCSS

$custom: #3758d9;
$custom-light: #8586e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3758d9",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 217
  },
  "hsl": {
    "h": 227.778,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51651,
    "c": 0.20082,
    "h": 267.6
  },
  "luminance": 0.12801
}

Semantic roles & 50–950 ramp

primary

#3758D9

secondary

#D9CB93

accent

#C73DEB

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3758D9

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

Preview Lab → · Contrast checker → · Palette generator →