#2178A5#2178A5

#2178A5 is a mid, moderate cyan. Relative luminance 0.165; OKLCH L 54.4% C 0.106 H 236.7°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#2178A5
RGB	rgb(33, 120, 165)
HSL	hsl(200, 67%, 39%)
HSV	hsv(200, 80%, 65%)
CMYK	cmyk(80%, 27.3%, 0%, 35.3%)
CIE-LAB	lab(47.59, -9.19, -31.21)
CIE-LCH	lch(47.59, 32.53, 253.59°)
OKLab	oklab(54.38% -0.058 -0.0882)
OKLCH	oklch(54.38% 0.106 236.7)
XYZ	xyz(14.1325, 16.4712, 38.0244)
Luminance	0.1647 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2178A5 #A54E21

analogous

#21A590 #2178A5 #2136A5

triadic

#2178A5 #A52178 #78A521

tetradic

#2178A5 #9021A5 #A54E21 #36A521

square

#2178A5 #9021A5 #A54E21 #36A521

split-complementary

#2178A5 #A52136 #A59021

monochromatic

#0D2E3F #175372 #2178A5 #2E9CD5 #61B4DF

Accessibility & contrast

On white

4.89

#2178A5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#2178A5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2178A5

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2178A5	#FFFFFF	#000000	##FFFFFF
##2178A5	1.00	4.89	4.29	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6278A7

Deuteranopia (green-blind)

#516BA4

Tritanopia (blue-blind)

#008488

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #2178a5;
/* rgb */ color: rgb(33, 120, 165);
/* oklch */ color: oklch(54.4% 0.106 236.7);

Tailwind

colors: {
  custom: {
    50: '#729ec0',
    500: '#2178a5',
    950: '#000000',
  },
}

SCSS

$custom: #2178a5;
$custom-light: #729ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#2178a5",
  "rgb": {
    "r": 33,
    "g": 120,
    "b": 165
  },
  "hsl": {
    "h": 200.455,
    "s": 66.667,
    "l": 38.824
  },
  "oklch": {
    "l": 0.54382,
    "c": 0.10553,
    "h": 236.7
  },
  "luminance": 0.16473
}

Semantic roles & 50–950 ramp

primary

#2178A5

secondary

#C4815E

accent

#793EEA

background

#F7F9FB

surface

#EDF2F7

border

#C8CCD0

text

#090E12

muted

#7B7E81

Preview Lab

Preview with #2178A5

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

Preview Lab → · Contrast checker → · Palette generator →