#3771CE#3771CE

#3771CE is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.9% C 0.156 H 259.5°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#3771CE
RGB	rgb(55, 113, 206)
HSL	hsl(217, 61%, 51%)
HSV	hsv(217, 73%, 81%)
CMYK	cmyk(73.3%, 45.1%, 0%, 19.2%)
CIE-LAB	lab(48.36, 12.98, -53.64)
CIE-LCH	lch(48.36, 55.19, 283.60°)
OKLab	oklab(55.88% -0.0285 -0.1537)
OKLCH	oklch(55.88% 0.156 259.5)
XYZ	xyz(18.6172, 17.0767, 60.6955)
Luminance	0.1708 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771CE #CE9437

analogous

#37BCCE #3771CE #4837CE

triadic

#3771CE #CE3771 #71CE37

tetradic

#3771CE #CE37BC #CE9437 #37CE48

square

#3771CE #CE37BC #CE9437 #37CE48

split-complementary

#3771CE #CE4837 #BCCE37

monochromatic

#1B3C6F #2756A0 #3771CE #6894DA #99B7E6

Accessibility & contrast

On white

4.76

#3771CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#3771CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771CE

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771CE	#FFFFFF	#000000	##FFFFFF
##3771CE	1.00	4.76	4.42	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417AD2

Deuteranopia (green-blind)

#216CCC

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3771ce;
/* rgb */ color: rgb(55, 113, 206);
/* oklch */ color: oklch(55.9% 0.156 259.5);

Tailwind

colors: {
  custom: {
    50: '#8199dd',
    500: '#3771ce',
    950: '#000000',
  },
}

SCSS

$custom: #3771ce;
$custom-light: #8199dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3771ce",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 206
  },
  "hsl": {
    "h": 216.954,
    "s": 60.643,
    "l": 51.176
  },
  "oklch": {
    "l": 0.55881,
    "c": 0.15631,
    "h": 259.5
  },
  "luminance": 0.17079
}

Semantic roles & 50–950 ramp

primary

#3771CE

secondary

#D2B88F

accent

#A644E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3771CE

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

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