#15537B#15537B

#15537B is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.4% C 0.090 H 242.4°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#15537B
RGB	rgb(21, 83, 123)
HSL	hsl(204, 71%, 28%)
HSV	hsv(204, 83%, 48%)
CMYK	cmyk(82.9%, 32.5%, 0%, 51.8%)
CIE-LAB	lab(33.51, -4.06, -28.08)
CIE-LCH	lch(33.51, 28.37, 261.77°)
OKLab	oklab(42.45% -0.0417 -0.0796)
OKLCH	oklch(42.45% 0.09 242.4)
XYZ	xyz(6.9763, 7.7751, 19.8681)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15537B #7B3D15

analogous

#157B70 #15537B #15207B

triadic

#15537B #7B1553 #537B15

tetradic

#15537B #70157B #7B3D15 #207B15

square

#15537B #70157B #7B3D15 #207B15

split-complementary

#15537B #7B1520 #7B7015

monochromatic

#04121A #0C3047 #15537B #1E76AF #2F98DB

Accessibility & contrast

On white

8.22

#15537B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#15537B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15537B

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15537B	#FFFFFF	#000000	##FFFFFF
##15537B	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#40547D

Deuteranopia (green-blind)

#324B7A

Tritanopia (blue-blind)

#005D61

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #15537b;
/* rgb */ color: rgb(21, 83, 123);
/* oklch */ color: oklch(42.4% 0.090 242.4);

Tailwind

colors: {
  custom: {
    50: '#6483a1',
    500: '#15537b',
    950: '#000000',
  },
}

SCSS

$custom: #15537b;
$custom-light: #6483a1;
$custom-dark: #000000;

JSON

{
  "hex": "#15537b",
  "rgb": {
    "r": 21,
    "g": 83,
    "b": 123
  },
  "hsl": {
    "h": 203.529,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.4245,
    "c": 0.08991,
    "h": 242.4
  },
  "luminance": 0.07776
}

Semantic roles & 50–950 ramp

primary

#15537B

secondary

#B0693B

accent

#813AEE

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0F

muted

#7A7C7E

Preview Lab

Preview with #15537B

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

Preview Lab → · Contrast checker → · Palette generator →