#3759B0#3759B0

#3759B0 is a mid, vivid blue. Relative luminance 0.111; OKLCH L 48.7% C 0.144 H 265.3°. Best body text is #FFFFFF at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#3759B0
RGB	rgb(55, 89, 176)
HSL	hsl(223, 52%, 45%)
HSV	hsv(223, 69%, 69%)
CMYK	cmyk(68.8%, 49.4%, 0%, 31%)
CIE-LAB	lab(39.73, 17.27, -50.10)
CIE-LCH	lch(39.73, 52.99, 289.02°)
OKLab	oklab(48.65% -0.0117 -0.1437)
OKLCH	oklch(48.65% 0.144 265.3)
XYZ	xyz(12.9817, 11.0903, 42.5224)
Luminance	0.1109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759B0 #B08E37

analogous

#3796B0 #3759B0 #5137B0

triadic

#3759B0 #B03759 #59B037

tetradic

#3759B0 #B03796 #B08E37 #37B051

square

#3759B0 #B03796 #B08E37 #37B051

split-complementary

#3759B0 #B05137 #96B037

monochromatic

#1A2A53 #284181 #3759B0 #5979CB #889FDA

Accessibility & contrast

On white

6.52

#3759B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#3759B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759B0

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759B0	#FFFFFF	#000000	##FFFFFF
##3759B0	1.00	6.52	3.22	6.52
#FFFFFF	6.52	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2963B3

Deuteranopia (green-blind)

#0358AE

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3759b0;
/* rgb */ color: rgb(55, 89, 176);
/* oklch */ color: oklch(48.7% 0.144 265.3);

Tailwind

colors: {
  custom: {
    50: '#7c87c8',
    500: '#3759b0',
    950: '#000000',
  },
}

SCSS

$custom: #3759b0;
$custom-light: #7c87c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3759b0",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 176
  },
  "hsl": {
    "h": 223.14,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.48653,
    "c": 0.14416,
    "h": 265.3
  },
  "luminance": 0.11092
}

Semantic roles & 50–950 ramp

primary

#3759B0

secondary

#C4B07F

accent

#B34CDC

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3759B0

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

Preview Lab → · Contrast checker → · Palette generator →