#153F5B#153F5B

#153F5B is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.3% C 0.067 H 241.6°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#153F5B
RGB	rgb(21, 63, 91)
HSL	hsl(204, 63%, 22%)
HSV	hsv(204, 77%, 36%)
CMYK	cmyk(76.9%, 30.8%, 0%, 64.3%)
CIE-LAB	lab(25.17, -3.89, -20.88)
CIE-LCH	lch(25.17, 21.24, 259.44°)
OKLab	oklab(35.29% -0.0319 -0.059)
OKLCH	oklch(35.29% 0.067 241.6)
XYZ	xyz(3.9744, 4.4693, 10.5487)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#153F5B #5B3115

analogous

#155B54 #153F5B #151C5B

triadic

#153F5B #5B153F #3F5B15

tetradic

#153F5B #54155B #5B3115 #1C5B15

square

#153F5B #54155B #5B3115 #1C5B15

split-complementary

#153F5B #5B151C #5B5415

monochromatic

#061119 #0A1D29 #153F5B #20618D #2C84BE

Accessibility & contrast

On white

11.09

#153F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#153F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #153F5B

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##153F5B	#FFFFFF	#000000	##FFFFFF
##153F5B	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323F5C

Deuteranopia (green-blind)

#28395A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #153f5b;
/* rgb */ color: rgb(21, 63, 91);
/* oklch */ color: oklch(35.3% 0.067 241.6);

Tailwind

colors: {
  custom: {
    50: '#5d7389',
    500: '#153f5b',
    950: '#000000',
  },
}

SCSS

$custom: #153f5b;
$custom-light: #5d7389;
$custom-dark: #000000;

JSON

{
  "hex": "#153f5b",
  "rgb": {
    "r": 21,
    "g": 63,
    "b": 91
  },
  "hsl": {
    "h": 204,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.35288,
    "c": 0.06705,
    "h": 241.6
  },
  "luminance": 0.0447
}

Semantic roles & 50–950 ramp

primary

#153F5B

secondary

#925D39

accent

#8442E6

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #153F5B

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

Preview Lab → · Contrast checker → · Palette generator →