#3770CD#3770CD

#3770CD is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.6% C 0.156 H 259.7°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3770CD
RGB	rgb(55, 112, 205)
HSL	hsl(217, 60%, 51%)
HSV	hsv(217, 73%, 80%)
CMYK	cmyk(73.2%, 45.4%, 0%, 19.6%)
CIE-LAB	lab(48.02, 13.24, -53.62)
CIE-LCH	lch(48.02, 55.23, 283.87°)
OKLab	oklab(55.6% -0.0278 -0.1536)
OKLCH	oklch(55.6% 0.156 259.7)
XYZ	xyz(18.3852, 16.8063, 60.0208)
Luminance	0.1681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770CD #CD9437

analogous

#37BBCD #3770CD #4937CD

triadic

#3770CD #CD3770 #70CD37

tetradic

#3770CD #CD37BB #CD9437 #37CD49

square

#3770CD #CD37BB #CD9437 #37CD49

split-complementary

#3770CD #CD4937 #BBCD37

monochromatic

#1C3B6E #28559F #3770CD #6893D9 #99B6E5

Accessibility & contrast

On white

4.81

#3770CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3770CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770CD

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770CD	#FFFFFF	#000000	##FFFFFF
##3770CD	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4079D1

Deuteranopia (green-blind)

#206CCB

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3770cd;
/* rgb */ color: rgb(55, 112, 205);
/* oklch */ color: oklch(55.6% 0.156 259.7);

Tailwind

colors: {
  custom: {
    50: '#8198dd',
    500: '#3770cd',
    950: '#000000',
  },
}

SCSS

$custom: #3770cd;
$custom-light: #8198dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3770cd",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 205
  },
  "hsl": {
    "h": 217.2,
    "s": 60,
    "l": 50.98
  },
  "oklch": {
    "l": 0.55598,
    "c": 0.15614,
    "h": 259.7
  },
  "luminance": 0.16808
}

Semantic roles & 50–950 ramp

primary

#3770CD

secondary

#D1B88F

accent

#A745E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3770CD

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

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