#2178A6#2178A6

#2178A6 is a mid, moderate cyan. Relative luminance 0.165; OKLCH L 54.4% C 0.107 H 237.3°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#2178A6
RGB	rgb(33, 120, 166)
HSL	hsl(201, 67%, 39%)
HSV	hsv(201, 80%, 65%)
CMYK	cmyk(80.1%, 27.7%, 0%, 34.9%)
CIE-LAB	lab(47.63, -8.82, -31.72)
CIE-LCH	lch(47.63, 32.92, 254.45°)
OKLab	oklab(54.44% -0.0576 -0.0897)
OKLCH	oklch(54.44% 0.107 237.3)
XYZ	xyz(14.2239, 16.5077, 38.5056)
Luminance	0.1651 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2178A6 #A64F21

analogous

#21A692 #2178A6 #2136A6

triadic

#2178A6 #A62178 #78A621

tetradic

#2178A6 #9221A6 #A64F21 #36A621

square

#2178A6 #9221A6 #A64F21 #36A621

split-complementary

#2178A6 #A62136 #A69221

monochromatic

#0D2E40 #175373 #2178A6 #2F9CD6 #62B4E0

Accessibility & contrast

On white

4.88

#2178A6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#2178A6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2178A6

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2178A6	#FFFFFF	#000000	##FFFFFF
##2178A6	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6278A8

Deuteranopia (green-blind)

#506CA5

Tritanopia (blue-blind)

#008488

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #2178a6;
/* rgb */ color: rgb(33, 120, 166);
/* oklch */ color: oklch(54.4% 0.107 237.3);

Tailwind

colors: {
  custom: {
    50: '#729ec0',
    500: '#2178a6',
    950: '#000000',
  },
}

SCSS

$custom: #2178a6;
$custom-light: #729ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#2178a6",
  "rgb": {
    "r": 33,
    "g": 120,
    "b": 166
  },
  "hsl": {
    "h": 200.752,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.54435,
    "c": 0.10659,
    "h": 237.3
  },
  "luminance": 0.16509
}

Semantic roles & 50–950 ramp

primary

#2178A6

secondary

#C5825E

accent

#793EEA

background

#F7F9FB

surface

#EDF2F7

border

#C8CCD0

text

#090E12

muted

#7B7E81

Preview Lab

Preview with #2178A6

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

Preview Lab → · Contrast checker → · Palette generator →