#218DB3#218DB3

#218DB3 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.3% C 0.108 H 227.4°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#218DB3
RGB	rgb(33, 141, 179)
HSL	hsl(196, 69%, 42%)
HSV	hsv(196, 82%, 70%)
CMYK	cmyk(81.6%, 21.2%, 0%, 29.8%)
CIE-LAB	lab(54.68, -16.03, -28.25)
CIE-LCH	lch(54.68, 32.48, 240.42°)
OKLab	oklab(60.25% -0.0729 -0.0794)
OKLCH	oklch(60.25% 0.108 227.4)
XYZ	xyz(18.2854, 22.6255, 46.0425)
Luminance	0.2263 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#218DB3 #B34721

analogous

#21B390 #218DB3 #2144B3

triadic

#218DB3 #B3218D #8DB321

tetradic

#218DB3 #9021B3 #B34721 #44B321

square

#218DB3 #9021B3 #B34721 #44B321

split-complementary

#218DB3 #B32144 #B39021

monochromatic

#0E3C4C #17647F #218DB3 #37B0DA #6BC4E4

Accessibility & contrast

On white

3.80

#218DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#218DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #218DB3

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##218DB3	#FFFFFF	#000000	##000000
##218DB3	1.00	3.80	5.53	5.53
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798AB5

Deuteranopia (green-blind)

#667DB3

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #218db3;
/* rgb */ color: rgb(33, 141, 179);
/* oklch */ color: oklch(60.3% 0.108 227.4);

Tailwind

colors: {
  custom: {
    50: '#76aeca',
    500: '#218db3',
    950: '#000000',
  },
}

SCSS

$custom: #218db3;
$custom-light: #76aeca;
$custom-dark: #000000;

JSON

{
  "hex": "#218db3",
  "rgb": {
    "r": 33,
    "g": 141,
    "b": 179
  },
  "hsl": {
    "h": 195.616,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.60252,
    "c": 0.10784,
    "h": 227.4
  },
  "luminance": 0.22628
}

Semantic roles & 50–950 ramp

primary

#218DB3

secondary

#CA8066

accent

#6A3CEC

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #218DB3

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

Preview Lab → · Contrast checker → · Palette generator →