#3775DD#3775DD

#3775DD is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.8% C 0.172 H 260.1°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3775DD
RGB	rgb(55, 117, 221)
HSL	hsl(218, 71%, 54%)
HSV	hsv(218, 75%, 87%)
CMYK	cmyk(75.1%, 47.1%, 0%, 13.3%)
CIE-LAB	lab(50.40, 16.00, -58.88)
CIE-LCH	lch(50.40, 61.01, 285.20°)
OKLab	oklab(57.75% -0.0294 -0.169)
OKLCH	oklch(57.75% 0.172 260.1)
XYZ	xyz(20.9833, 18.7529, 70.9064)
Luminance	0.1875 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3775DD #DD9F37

analogous

#37C8DD #3775DD #4C37DD

triadic

#3775DD #DD3775 #75DD37

tetradic

#3775DD #DD37C8 #DD9F37 #37DD4C

square

#3775DD #DD37C8 #DD9F37 #37DD4C

split-complementary

#3775DD #DD4C37 #C8DD37

monochromatic

#163F83 #1F58B8 #3775DD #6B99E6 #A0BDEF

Accessibility & contrast

On white

4.42

#3775DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#3775DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3775DD

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3775DD	#FFFFFF	#000000	##000000
##3775DD	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C80E1

Deuteranopia (green-blind)

#0871DB

Tritanopia (blue-blind)

#008E9E

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3775dd;
/* rgb */ color: rgb(55, 117, 221);
/* oklch */ color: oklch(57.8% 0.172 260.1);

Tailwind

colors: {
  custom: {
    50: '#849ce8',
    500: '#3775dd',
    950: '#000000',
  },
}

SCSS

$custom: #3775dd;
$custom-light: #849ce8;
$custom-dark: #000000;

JSON

{
  "hex": "#3775dd",
  "rgb": {
    "r": 55,
    "g": 117,
    "b": 221
  },
  "hsl": {
    "h": 217.59,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.5775,
    "c": 0.17156,
    "h": 260.1
  },
  "luminance": 0.18755
}

Semantic roles & 50–950 ramp

primary

#3775DD

secondary

#DBC195

accent

#AB3AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3775DD

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

Preview Lab → · Contrast checker → · Palette generator →