#3771DA#3771DA

#3771DA is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.7% C 0.172 H 261.1°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3771DA
RGB	rgb(55, 113, 218)
HSL	hsl(219, 69%, 54%)
HSV	hsv(219, 75%, 85%)
CMYK	cmyk(74.8%, 48.2%, 0%, 14.5%)
CIE-LAB	lab(49.11, 17.40, -59.26)
CIE-LCH	lch(49.11, 61.76, 286.37°)
OKLab	oklab(56.7% -0.0266 -0.1702)
OKLCH	oklch(56.7% 0.172 261.1)
XYZ	xyz(20.1310, 17.6822, 68.6681)
Luminance	0.1768 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771DA #DAA037

analogous

#37C2DA #3771DA #4E37DA

triadic

#3771DA #DA3771 #71DA37

tetradic

#3771DA #DA37C2 #DAA037 #37DA4E

square

#3771DA #DA37C2 #DAA037 #37DA4E

split-complementary

#3771DA #DA4E37 #C2DA37

monochromatic

#183C7F #2155B3 #3771DA #6B96E4 #9EBAED

Accessibility & contrast

On white

4.63

#3771DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3771DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3771DA

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771DA	#FFFFFF	#000000	##FFFFFF
##3771DA	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#357DDE

Deuteranopia (green-blind)

#006ED8

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3771da;
/* rgb */ color: rgb(55, 113, 218);
/* oklch */ color: oklch(56.7% 0.172 261.1);

Tailwind

colors: {
  custom: {
    50: '#8499e6',
    500: '#3771da',
    950: '#000000',
  },
}

SCSS

$custom: #3771da;
$custom-light: #8499e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3771da",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 218
  },
  "hsl": {
    "h": 218.65,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.567,
    "c": 0.17229,
    "h": 261.1
  },
  "luminance": 0.17684
}

Semantic roles & 50–950 ramp

primary

#3771DA

secondary

#D9C093

accent

#AD3CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3771DA

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

Preview Lab → · Contrast checker → · Palette generator →