#3759D9#3759D9

#3759D9 is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.8% C 0.200 H 267.4°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#3759D9
RGB	rgb(55, 89, 217)
HSL	hsl(227, 68%, 53%)
HSV	hsv(227, 75%, 85%)
CMYK	cmyk(74.7%, 59%, 0%, 14.9%)
CIE-LAB	lab(42.71, 32.29, -69.06)
CIE-LCH	lch(42.71, 76.24, 295.06°)
OKLab	oklab(51.84% -0.0089 -0.1994)
OKLCH	oklch(51.84% 0.2 267.4)
XYZ	xyz(17.6680, 12.9648, 67.2035)
Luminance	0.1297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759D9 #D9B737

analogous

#37AAD9 #3759D9 #6637D9

triadic

#3759D9 #D93759 #59D937

tetradic

#3759D9 #D937AA #D9B737 #37D966

square

#3759D9 #D937AA #D9B737 #37D966

split-complementary

#3759D9 #D96637 #AAD937

monochromatic

#182D7E #2240B1 #3759D9 #6A84E3 #9EAEED

Accessibility & contrast

On white

5.84

#3759D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#3759D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759D9

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759D9	#FFFFFF	#000000	##FFFFFF
##3759D9	1.00	5.84	3.59	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DDD

Deuteranopia (green-blind)

#005ED7

Tritanopia (blue-blind)

#007990

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3759d9;
/* rgb */ color: rgb(55, 89, 217);
/* oklch */ color: oklch(51.8% 0.200 267.4);

Tailwind

colors: {
  custom: {
    50: '#8587e6',
    500: '#3759d9',
    950: '#000000',
  },
}

SCSS

$custom: #3759d9;
$custom-light: #8587e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3759d9",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 217
  },
  "hsl": {
    "h": 227.407,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51838,
    "c": 0.19964,
    "h": 267.4
  },
  "luminance": 0.12967
}

Semantic roles & 50–950 ramp

primary

#3759D9

secondary

#D9CA93

accent

#C63DEB

background

#F8F8FE

surface

#F0EFFC

border

#CBCAD5

text

#0D0B16

muted

#7D7C84

Preview Lab

Preview with #3759D9

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

Preview Lab → · Contrast checker → · Palette generator →