#21718F#21718F

#21718F is a mid, moderate cyan. Relative luminance 0.141; OKLCH L 51.5% C 0.088 H 227.8°. Best body text is #FFFFFF at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#21718F
RGB	rgb(33, 113, 143)
HSL	hsl(196, 63%, 35%)
HSV	hsv(196, 77%, 56%)
CMYK	cmyk(76.9%, 21%, 0%, 43.9%)
CIE-LAB	lab(44.40, -13.12, -23.20)
CIE-LCH	lch(44.40, 26.65, 240.51°)
OKLab	oklab(51.51% -0.0591 -0.0651)
OKLCH	oklch(51.51% 0.088 227.8)
XYZ	xyz(11.4882, 14.1154, 28.1003)
Luminance	0.1412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21718F #8F3F21

analogous

#218F76 #21718F #213A8F

triadic

#21718F #8F2171 #718F21

tetradic

#21718F #76218F #8F3F21 #3A8F21

square

#21718F #76218F #8F3F21 #3A8F21

split-complementary

#21718F #8F213A #8F7621

monochromatic

#0A222C #164A5D #21718F #2C98C1 #53B3D7

Accessibility & contrast

On white

5.49

#21718F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.82

#21718F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21718F

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21718F	#FFFFFF	#000000	##FFFFFF
##21718F	1.00	5.49	3.82	5.49
#FFFFFF	5.49	1.00	21.00	1.00
#000000	3.82	21.00	1.00	21.00
##FFFFFF	5.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#616F90

Deuteranopia (green-blind)

#52648F

Tritanopia (blue-blind)

#007A7B

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #21718f;
/* rgb */ color: rgb(33, 113, 143);
/* oklch */ color: oklch(51.5% 0.088 227.8);

Tailwind

colors: {
  custom: {
    50: '#6e99b0',
    500: '#21718f',
    950: '#000000',
  },
}

SCSS

$custom: #21718f;
$custom-light: #6e99b0;
$custom-dark: #000000;

JSON

{
  "hex": "#21718f",
  "rgb": {
    "r": 33,
    "g": 113,
    "b": 143
  },
  "hsl": {
    "h": 196.364,
    "s": 62.5,
    "l": 34.51
  },
  "oklch": {
    "l": 0.51512,
    "c": 0.08795,
    "h": 227.8
  },
  "luminance": 0.14117
}

Semantic roles & 50–950 ramp

primary

#21718F

secondary

#BB6E51

accent

#6F42E6

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#080E10

muted

#7B7E7F

Preview Lab

Preview with #21718F

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

Preview Lab → · Contrast checker → · Palette generator →