#3780B0#3780B0

#3780B0 is a mid, moderate cyan. Relative luminance 0.194; OKLCH L 57.5% C 0.103 H 240.8°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3780B0
RGB	rgb(55, 128, 176)
HSL	hsl(204, 52%, 45%)
HSV	hsv(204, 69%, 69%)
CMYK	cmyk(68.8%, 27.3%, 0%, 31%)
CIE-LAB	lab(51.13, -6.95, -32.01)
CIE-LCH	lch(51.13, 32.76, 257.76°)
OKLab	oklab(57.53% -0.0505 -0.0902)
OKLCH	oklch(57.53% 0.103 240.8)
XYZ	xyz(17.1282, 19.3833, 43.9045)
Luminance	0.1938 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780B0 #B06737

analogous

#37B0A4 #3780B0 #3743B0

triadic

#3780B0 #B03780 #80B037

tetradic

#3780B0 #A437B0 #B06737 #43B037

square

#3780B0 #A437B0 #B06737 #43B037

split-complementary

#3780B0 #B03743 #B0A437

monochromatic

#1A3C53 #285E81 #3780B0 #599ECB #88B9DA

Accessibility & contrast

On white

4.31

#3780B0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#3780B0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780B0

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780B0	#FFFFFF	#000000	##000000
##3780B0	1.00	4.31	4.88	4.88
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A80B2

Deuteranopia (green-blind)

#5975AF

Tritanopia (blue-blind)

#008C91

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3780b0;
/* rgb */ color: rgb(55, 128, 176);
/* oklch */ color: oklch(57.5% 0.103 240.8);

Tailwind

colors: {
  custom: {
    50: '#7ca4c8',
    500: '#3780b0',
    950: '#000000',
  },
}

SCSS

$custom: #3780b0;
$custom-light: #7ca4c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3780b0",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 176
  },
  "hsl": {
    "h": 203.802,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.57533,
    "c": 0.10339,
    "h": 240.8
  },
  "luminance": 0.19385
}

Semantic roles & 50–950 ramp

primary

#3780B0

secondary

#C49A7F

accent

#854CDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3780B0

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

Preview Lab → · Contrast checker → · Palette generator →