#21819B#21819B

#21819B is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.1% C 0.093 H 220.7°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#21819B
RGB	rgb(33, 129, 155)
HSL	hsl(193, 65%, 37%)
HSV	hsv(193, 79%, 61%)
CMYK	cmyk(78.7%, 16.8%, 0%, 39.2%)
CIE-LAB	lab(49.96, -17.83, -21.68)
CIE-LCH	lch(49.96, 28.07, 230.57°)
OKLab	oklab(56.14% -0.0706 -0.0607)
OKLCH	oklch(56.14% 0.093 220.7)
XYZ	xyz(14.3914, 18.3886, 33.7949)
Luminance	0.1839 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21819B #9B3B21

analogous

#219B78 #21819B #21449B

triadic

#21819B #9B2181 #819B21

tetradic

#21819B #78219B #9B3B21 #449B21

square

#21819B #78219B #9B3B21 #449B21

split-complementary

#21819B #9B2144 #9B7821

monochromatic

#0C2D36 #165769 #21819B #2CABCD #5AC0DC

Accessibility & contrast

On white

4.49

#21819B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#21819B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #21819B

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21819B	#FFFFFF	#000000	##000000
##21819B	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#717E9C

Deuteranopia (green-blind)

#61729B

Tritanopia (blue-blind)

#008989

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #21819b;
/* rgb */ color: rgb(33, 129, 155);
/* oklch */ color: oklch(56.1% 0.093 220.7);

Tailwind

colors: {
  custom: {
    50: '#71a5b8',
    500: '#21819b',
    950: '#000000',
  },
}

SCSS

$custom: #21819b;
$custom-light: #71a5b8;
$custom-dark: #000000;

JSON

{
  "hex": "#21819b",
  "rgb": {
    "r": 33,
    "g": 129,
    "b": 155
  },
  "hsl": {
    "h": 192.787,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.56139,
    "c": 0.09308,
    "h": 220.7
  },
  "luminance": 0.1839
}

Semantic roles & 50–950 ramp

primary

#21819B

secondary

#C06E58

accent

#6440E8

background

#F7FAFB

surface

#EDF4F6

border

#C8CED0

text

#090F11

muted

#7B7F80

Preview Lab

Preview with #21819B

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

Preview Lab → · Contrast checker → · Palette generator →