#21738B#21738B

#21738B is a mid, moderate cyan. Relative luminance 0.144; OKLCH L 51.8% C 0.084 H 221.8°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#21738B
RGB	rgb(33, 115, 139)
HSL	hsl(194, 62%, 34%)
HSV	hsv(194, 76%, 55%)
CMYK	cmyk(76.3%, 17.3%, 0%, 45.5%)
CIE-LAB	lab(44.87, -15.66, -20.09)
CIE-LCH	lch(44.87, 25.48, 232.06°)
OKLab	oklab(51.83% -0.0628 -0.0562)
OKLCH	oklch(51.83% 0.084 221.8)
XYZ	xyz(11.4162, 14.4475, 26.6081)
Luminance	0.1445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21738B #8B3921

analogous

#218B6E #21738B #213E8B

triadic

#21738B #8B2173 #738B21

tetradic

#21738B #6E218B #8B3921 #3E8B21

square

#21738B #6E218B #8B3921 #3E8B21

split-complementary

#21738B #8B213E #8B6E21

monochromatic

#0A2128 #154A5A #21738B #2D9CBC #51B8D6

Accessibility & contrast

On white

5.40

#21738B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#21738B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #21738B

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21738B	#FFFFFF	#000000	##FFFFFF
##21738B	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#65708C

Deuteranopia (green-blind)

#57668B

Tritanopia (blue-blind)

#007B7B

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #21738b;
/* rgb */ color: rgb(33, 115, 139);
/* oklch */ color: oklch(51.8% 0.084 221.8);

Tailwind

colors: {
  custom: {
    50: '#6d9bad',
    500: '#21738b',
    950: '#000000',
  },
}

SCSS

$custom: #21738b;
$custom-light: #6d9bad;
$custom-dark: #000000;

JSON

{
  "hex": "#21738b",
  "rgb": {
    "r": 33,
    "g": 115,
    "b": 139
  },
  "hsl": {
    "h": 193.585,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.51832,
    "c": 0.08427,
    "h": 221.8
  },
  "luminance": 0.14449
}

Semantic roles & 50–950 ramp

primary

#21738B

secondary

#B9674F

accent

#6843E5

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#080E10

muted

#7B7E7F

Preview Lab

Preview with #21738B

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

Preview Lab → · Contrast checker → · Palette generator →