#3755D9#3755D9

#3755D9 is a mid, highly saturated blue. Relative luminance 0.123; OKLCH L 51.1% C 0.204 H 268.2°. Best body text is #FFFFFF at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#3755D9
RGB	rgb(55, 85, 217)
HSL	hsl(229, 68%, 53%)
HSV	hsv(229, 75%, 85%)
CMYK	cmyk(74.7%, 60.8%, 0%, 14.9%)
CIE-LAB	lab(41.72, 34.83, -70.68)
CIE-LCH	lch(41.72, 78.80, 296.23°)
OKLab	oklab(51.1% -0.0063 -0.2042)
OKLCH	oklch(51.1% 0.204 268.2)
XYZ	xyz(17.3441, 12.3171, 67.0955)
Luminance	0.1232 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3755D9 #D9BB37

analogous

#37A6D9 #3755D9 #6A37D9

triadic

#3755D9 #D93755 #55D937

tetradic

#3755D9 #D937A6 #D9BB37 #37D96A

square

#3755D9 #D937A6 #D9BB37 #37D96A

split-complementary

#3755D9 #D96A37 #A6D937

monochromatic

#182B7E #223CB1 #3755D9 #6A81E3 #9EACED

Accessibility & contrast

On white

6.06

#3755D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3755D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3755D9

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3755D9	#FFFFFF	#000000	##FFFFFF
##3755D9	1.00	6.06	3.46	6.06
#FFFFFF	6.06	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ADD

Deuteranopia (green-blind)

#005BD6

Tritanopia (blue-blind)

#00778F

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3755d9;
/* rgb */ color: rgb(55, 85, 217);
/* oklch */ color: oklch(51.1% 0.204 268.2);

Tailwind

colors: {
  custom: {
    50: '#8584e6',
    500: '#3755d9',
    950: '#000000',
  },
}

SCSS

$custom: #3755d9;
$custom-light: #8584e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3755d9",
  "rgb": {
    "r": 55,
    "g": 85,
    "b": 217
  },
  "hsl": {
    "h": 228.889,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51099,
    "c": 0.20435,
    "h": 268.2
  },
  "luminance": 0.12319
}

Semantic roles & 50–950 ramp

primary

#3755D9

secondary

#D9CC93

accent

#CB3DEB

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3755D9

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

Preview Lab → · Contrast checker → · Palette generator →