#21708B#21708B

#21708B is a mid, moderate cyan. Relative luminance 0.138; OKLCH L 51.1% C 0.085 H 225.4°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#21708B
RGB	rgb(33, 112, 139)
HSL	hsl(195, 62%, 34%)
HSV	hsv(195, 76%, 55%)
CMYK	cmyk(76.3%, 19.4%, 0%, 45.5%)
CIE-LAB	lab(43.91, -13.97, -21.57)
CIE-LCH	lch(43.91, 25.70, 237.07°)
OKLab	oklab(51.06% -0.0596 -0.0605)
OKLCH	oklch(51.06% 0.085 225.4)
XYZ	xyz(11.0797, 13.7744, 26.4959)
Luminance	0.1378 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21708B #8B3C21

analogous

#218B71 #21708B #213B8B

triadic

#21708B #8B2170 #708B21

tetradic

#21708B #71218B #8B3C21 #3B8B21

square

#21708B #71218B #8B3C21 #3B8B21

split-complementary

#21708B #8B213B #8B7121

monochromatic

#0A2028 #15485A #21708B #2D98BC #51B4D6

Accessibility & contrast

On white

5.59

#21708B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#21708B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21708B

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21708B	#FFFFFF	#000000	##FFFFFF
##21708B	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#616E8C

Deuteranopia (green-blind)

#53638B

Tritanopia (blue-blind)

#007879

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #21708b;
/* rgb */ color: rgb(33, 112, 139);
/* oklch */ color: oklch(51.1% 0.085 225.4);

Tailwind

colors: {
  custom: {
    50: '#6d99ad',
    500: '#21708b',
    950: '#000000',
  },
}

SCSS

$custom: #21708b;
$custom-light: #6d99ad;
$custom-dark: #000000;

JSON

{
  "hex": "#21708b",
  "rgb": {
    "r": 33,
    "g": 112,
    "b": 139
  },
  "hsl": {
    "h": 195.283,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.51063,
    "c": 0.08493,
    "h": 225.4
  },
  "luminance": 0.13776
}

Semantic roles & 50–950 ramp

primary

#21708B

secondary

#B96A4F

accent

#6C43E5

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#080D10

muted

#7B7E7F

Preview Lab

Preview with #21708B

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

Preview Lab → · Contrast checker → · Palette generator →