#2178A8#2178A8

#2178A8 is a mid, moderate cyan. Relative luminance 0.166; OKLCH L 54.5% C 0.109 H 238.4°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#2178A8
RGB	rgb(33, 120, 168)
HSL	hsl(201, 67%, 39%)
HSV	hsv(201, 80%, 66%)
CMYK	cmyk(80.4%, 28.6%, 0%, 34.1%)
CIE-LAB	lab(47.73, -8.09, -32.74)
CIE-LCH	lch(47.73, 33.72, 256.12°)
OKLab	oklab(54.54% -0.057 -0.0926)
OKLCH	oklch(54.54% 0.109 238.4)
XYZ	xyz(14.4087, 16.5817, 39.4794)
Luminance	0.1658 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2178A8 #A85121

analogous

#21A895 #2178A8 #2135A8

triadic

#2178A8 #A82178 #78A821

tetradic

#2178A8 #9521A8 #A85121 #35A821

square

#2178A8 #9521A8 #A85121 #35A821

split-complementary

#2178A8 #A82135 #A89521

monochromatic

#0D2F42 #175375 #2178A8 #309BD6 #63B4E0

Accessibility & contrast

On white

4.86

#2178A8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#2178A8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2178A8

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2178A8	#FFFFFF	#000000	##FFFFFF
##2178A8	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6178AA

Deuteranopia (green-blind)

#4F6CA7

Tritanopia (blue-blind)

#008489

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #2178a8;
/* rgb */ color: rgb(33, 120, 168);
/* oklch */ color: oklch(54.5% 0.109 238.4);

Tailwind

colors: {
  custom: {
    50: '#729ec2',
    500: '#2178a8',
    950: '#000000',
  },
}

SCSS

$custom: #2178a8;
$custom-light: #729ec2;
$custom-dark: #000000;

JSON

{
  "hex": "#2178a8",
  "rgb": {
    "r": 33,
    "g": 120,
    "b": 168
  },
  "hsl": {
    "h": 201.333,
    "s": 67.164,
    "l": 39.412
  },
  "oklch": {
    "l": 0.54541,
    "c": 0.10873,
    "h": 238.4
  },
  "luminance": 0.16583
}

Semantic roles & 50–950 ramp

primary

#2178A8

secondary

#C5845F

accent

#7B3EEA

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#090E12

muted

#7B7E81

Preview Lab

Preview with #2178A8

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

Preview Lab → · Contrast checker → · Palette generator →