#218CB3#218CB3

#218CB3 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.0% C 0.108 H 228.3°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#218CB3
RGB	rgb(33, 140, 179)
HSL	hsl(196, 69%, 42%)
HSV	hsv(196, 82%, 70%)
CMYK	cmyk(81.6%, 21.8%, 0%, 29.8%)
CIE-LAB	lab(54.38, -15.48, -28.72)
CIE-LCH	lch(54.38, 32.63, 241.67°)
OKLab	oklab(60.01% -0.072 -0.0808)
OKLCH	oklch(60.01% 0.108 228.3)
XYZ	xyz(18.1386, 22.3319, 45.9936)
Luminance	0.2233 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#218CB3 #B34821

analogous

#21B391 #218CB3 #2143B3

triadic

#218CB3 #B3218C #8CB321

tetradic

#218CB3 #9121B3 #B34821 #43B321

square

#218CB3 #9121B3 #B34821 #43B321

split-complementary

#218CB3 #B32143 #B39121

monochromatic

#0E3B4C #17647F #218CB3 #37AFDA #6BC3E4

Accessibility & contrast

On white

3.84

#218CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#218CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #218CB3

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##218CB3	#FFFFFF	#000000	##000000
##218CB3	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778AB5

Deuteranopia (green-blind)

#647CB2

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #218cb3;
/* rgb */ color: rgb(33, 140, 179);
/* oklch */ color: oklch(60.0% 0.108 228.3);

Tailwind

colors: {
  custom: {
    50: '#76adca',
    500: '#218cb3',
    950: '#000000',
  },
}

SCSS

$custom: #218cb3;
$custom-light: #76adca;
$custom-dark: #000000;

JSON

{
  "hex": "#218cb3",
  "rgb": {
    "r": 33,
    "g": 140,
    "b": 179
  },
  "hsl": {
    "h": 196.027,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.60007,
    "c": 0.10823,
    "h": 228.3
  },
  "luminance": 0.22334
}

Semantic roles & 50–950 ramp

primary

#218CB3

secondary

#CA8166

accent

#6B3CEC

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #218CB3

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

Preview Lab → · Contrast checker → · Palette generator →