#21404B#21404B

#21404B is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.2% C 0.041 H 223.1°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX#21404B
RGBrgb(33, 64, 75)
HSLhsl(196, 39%, 21%)
HSVhsv(196, 56%, 29%)
CMYKcmyk(56%, 14.7%, 0%, 70.6%)
CIE-LABlab(25.25, -7.90, -10.22)
CIE-LCHlch(25.25, 12.92, 232.30°)
OKLaboklab(35.25% -0.0302 -0.0283)
OKLCHoklch(35.25% 0.041 223.1)
XYZxyz(3.7301, 4.4978, 7.3268)
Luminance0.0450 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#21404B #4B2C21
analogous
#214B41 #21404B #212B4B
triadic
#21404B #4B2140 #404B21
tetradic
#21404B #41214B #4B2C21 #2B4B21
square
#21404B #41214B #4B2C21 #2B4B21
split-complementary
#21404B #4B212B #4B4121
monochromatic
#091215 #0E1C20 #21404B #346475 #4689A0

Accessibility & contrast

On white

11.05
#21404B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.90
#21404B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21404B
11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##21404B#FFFFFF#000000##FFFFFF
##21404B1.0011.051.9011.05
#FFFFFF11.051.0021.001.00
#0000001.9021.001.0021.00
##FFFFFF11.051.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3A3F4C
Deuteranopia (green-blind)
#333A4B
Tritanopia (blue-blind)
#094343
Achromatopsia (no color)
#3C3C3C

Design tokens & code

CSS
--color: #21404b;
/* rgb */ color: rgb(33, 64, 75);
/* oklch */ color: oklch(35.2% 0.041 223.1);
Tailwind
colors: {
  custom: {
    50: '#60747d',
    500: '#21404b',
    950: '#000000',
  },
}
SCSS
$custom: #21404b;
$custom-light: #60747d;
$custom-dark: #000000;
JSON
{
  "hex": "#21404b",
  "rgb": {
    "r": 33,
    "g": 64,
    "b": 75
  },
  "hsl": {
    "h": 195.714,
    "s": 38.889,
    "l": 21.176
  },
  "oklch": {
    "l": 0.35247,
    "c": 0.04142,
    "h": 223.1
  },
  "luminance": 0.04498
}

Semantic roles & 50–950 ramp

primary
#21404B
secondary
#7F5749
accent
#7859CF
background
#F5F7F7
surface
#EAEDEE
border
#C6C8C9
text
#050809
muted
#797B7B

Preview Lab

Preview with #21404B

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

Preview Lab → · Contrast checker → · Palette generator →

#21404B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva