#3780AC#3780AC

#3780AC is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.3% C 0.099 H 238.4°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3780AC
RGB	rgb(55, 128, 172)
HSL	hsl(203, 52%, 45%)
HSV	hsv(203, 68%, 67%)
CMYK	cmyk(68%, 25.6%, 0%, 32.5%)
CIE-LAB	lab(50.95, -8.33, -29.98)
CIE-LCH	lch(50.95, 31.12, 254.48°)
OKLab	oklab(57.33% -0.0518 -0.0844)
OKLCH	oklch(57.33% 0.099 238.4)
XYZ	xyz(16.7382, 19.2273, 41.8508)
Luminance	0.1923 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780AC #AC6337

analogous

#37AC9E #3780AC #3746AC

triadic

#3780AC #AC3780 #80AC37

tetradic

#3780AC #9E37AC #AC6337 #46AC37

square

#3780AC #9E37AC #AC6337 #46AC37

split-complementary

#3780AC #AC3746 #AC9E37

monochromatic

#193B4F #285D7E #3780AC #579EC9 #85B9D8

Accessibility & contrast

On white

4.33

#3780AC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#3780AC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780AC

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780AC	#FFFFFF	#000000	##000000
##3780AC	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C80AE

Deuteranopia (green-blind)

#5B74AB

Tritanopia (blue-blind)

#008B8F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3780ac;
/* rgb */ color: rgb(55, 128, 172);
/* oklch */ color: oklch(57.3% 0.099 238.4);

Tailwind

colors: {
  custom: {
    50: '#7ba4c5',
    500: '#3780ac',
    950: '#000000',
  },
}

SCSS

$custom: #3780ac;
$custom-light: #7ba4c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3780ac",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 172
  },
  "hsl": {
    "h": 202.564,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.5733,
    "c": 0.09901,
    "h": 238.4
  },
  "luminance": 0.19229
}

Semantic roles & 50–950 ramp

primary

#3780AC

secondary

#C2977D

accent

#824DDB

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #3780AC

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

Preview Lab → · Contrast checker → · Palette generator →