#3780D9#3780D9

#3780D9 is a mid, vivid cyan. Relative luminance 0.213; OKLCH L 59.9% C 0.154 H 255.2°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#3780D9
RGB	rgb(55, 128, 217)
HSL	hsl(213, 68%, 53%)
HSV	hsv(213, 75%, 85%)
CMYK	cmyk(74.7%, 41%, 0%, 14.9%)
CIE-LAB	lab(53.23, 7.72, -52.08)
CIE-LCH	lch(53.23, 52.65, 278.43°)
OKLab	oklab(59.86% -0.0393 -0.1488)
OKLCH	oklch(59.86% 0.154 255.2)
XYZ	xyz(21.8145, 21.2578, 68.5857)
Luminance	0.2126 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780D9 #D99037

analogous

#37D1D9 #3780D9 #3F37D9

triadic

#3780D9 #D93780 #80D937

tetradic

#3780D9 #D937D1 #D99037 #37D93F

square

#3780D9 #D937D1 #D99037 #37D93F

split-complementary

#3780D9 #D93F37 #D1D937

monochromatic

#18467E #2262B1 #3780D9 #6AA1E3 #9EC1ED

Accessibility & contrast

On white

4.00

#3780D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#3780D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780D9

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780D9	#FFFFFF	#000000	##000000
##3780D9	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5587DD

Deuteranopia (green-blind)

#3A78D7

Tritanopia (blue-blind)

#0095A2

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3780d9;
/* rgb */ color: rgb(55, 128, 217);
/* oklch */ color: oklch(59.9% 0.154 255.2);

Tailwind

colors: {
  custom: {
    50: '#83a4e5',
    500: '#3780d9',
    950: '#000000',
  },
}

SCSS

$custom: #3780d9;
$custom-light: #83a4e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3780d9",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 217
  },
  "hsl": {
    "h": 212.963,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.59864,
    "c": 0.15396,
    "h": 255.2
  },
  "luminance": 0.2126
}

Semantic roles & 50–950 ramp

primary

#3780D9

secondary

#D9B993

accent

#9C3DEB

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #3780D9

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

Preview Lab → · Contrast checker → · Palette generator →