#155B7B#155B7B

#155B7B is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.5% C 0.084 H 233.7°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#155B7B
RGB	rgb(21, 91, 123)
HSL	hsl(199, 71%, 28%)
HSV	hsv(199, 83%, 48%)
CMYK	cmyk(82.9%, 26%, 0%, 51.8%)
CIE-LAB	lab(36.12, -9.02, -23.99)
CIE-LCH	lch(36.12, 25.63, 249.39°)
OKLab	oklab(44.52% -0.0497 -0.0677)
OKLCH	oklch(44.52% 0.084 233.7)
XYZ	xyz(7.6241, 9.0707, 20.0841)
Luminance	0.0907 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#155B7B #7B3515

analogous

#157B68 #155B7B #15287B

triadic

#155B7B #7B155B #5B7B15

tetradic

#155B7B #68157B #7B3515 #287B15

square

#155B7B #68157B #7B3515 #287B15

split-complementary

#155B7B #7B1528 #7B6815

monochromatic

#04131A #0C3447 #155B7B #1E82AF #2FA5DB

Accessibility & contrast

On white

7.46

#155B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#155B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #155B7B

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##155B7B	#FFFFFF	#000000	##FFFFFF
##155B7B	1.00	7.46	2.81	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B5A7C

Deuteranopia (green-blind)

#3E517A

Tritanopia (blue-blind)

#006366

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #155b7b;
/* rgb */ color: rgb(21, 91, 123);
/* oklch */ color: oklch(44.5% 0.084 233.7);

Tailwind

colors: {
  custom: {
    50: '#6589a1',
    500: '#155b7b',
    950: '#000000',
  },
}

SCSS

$custom: #155b7b;
$custom-light: #6589a1;
$custom-dark: #000000;

JSON

{
  "hex": "#155b7b",
  "rgb": {
    "r": 21,
    "g": 91,
    "b": 123
  },
  "hsl": {
    "h": 198.824,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.44523,
    "c": 0.08396,
    "h": 233.7
  },
  "luminance": 0.09072
}

Semantic roles & 50–950 ramp

primary

#155B7B

secondary

#B0603B

accent

#723AEE

background

#F6F8F9

surface

#EBF0F2

border

#C6CBCC

text

#060B0F

muted

#7A7C7E

Preview Lab

Preview with #155B7B

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

Preview Lab → · Contrast checker → · Palette generator →