#3780BE#3780BE

#3780BE is a mid, moderate cyan. Relative luminance 0.200; OKLCH L 58.3% C 0.120 H 247.4°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#3780BE
RGB	rgb(55, 128, 190)
HSL	hsl(208, 55%, 48%)
HSV	hsv(208, 71%, 75%)
CMYK	cmyk(71.1%, 32.6%, 0%, 25.5%)
CIE-LAB	lab(51.80, -2.02, -39.01)
CIE-LCH	lch(51.80, 39.07, 267.03°)
OKLab	oklab(58.28% -0.0461 -0.1106)
OKLCH	oklch(58.28% 0.12 247.4)
XYZ	xyz(18.5855, 19.9662, 51.5796)
Luminance	0.1997 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780BE #BE7537

analogous

#37BEB9 #3780BE #373CBE

triadic

#3780BE #BE3780 #80BE37

tetradic

#3780BE #B937BE #BE7537 #3CBE37

square

#3780BE #B937BE #BE7537 #3CBE37

split-complementary

#3780BE #BE373C #BEB937

monochromatic

#1C405F #29608F #3780BE #619ED1 #90BBDF

Accessibility & contrast

On white

4.21

#3780BE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#3780BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780BE

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780BE	#FFFFFF	#000000	##000000
##3780BE	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6483C1

Deuteranopia (green-blind)

#5176BD

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3780be;
/* rgb */ color: rgb(55, 128, 190);
/* oklch */ color: oklch(58.3% 0.120 247.4);

Tailwind

colors: {
  custom: {
    50: '#7ea4d2',
    500: '#3780be',
    950: '#000000',
  },
}

SCSS

$custom: #3780be;
$custom-light: #7ea4d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3780be",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 190
  },
  "hsl": {
    "h": 207.556,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.58277,
    "c": 0.11983,
    "h": 247.4
  },
  "luminance": 0.19968
}

Semantic roles & 50–950 ramp

primary

#3780BE

secondary

#CAA687

accent

#8E49DE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3780BE

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

Preview Lab → · Contrast checker → · Palette generator →