#103B5B#103B5B

#103B5B is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.073 H 245.1°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#103B5B
RGB	rgb(16, 59, 91)
HSL	hsl(206, 70%, 21%)
HSV	hsv(206, 82%, 36%)
CMYK	cmyk(82.4%, 35.2%, 0%, 64.3%)
CIE-LAB	lab(23.65, -1.97, -23.28)
CIE-LCH	lch(23.65, 23.36, 265.15°)
OKLab	oklab(34.04% -0.0306 -0.0661)
OKLCH	oklch(34.04% 0.073 245.1)
XYZ	xyz(3.6652, 3.9930, 10.4731)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103B5B #5B3010

analogous

#105B55 #103B5B #10155B

triadic

#103B5B #5B103B #3B5B10

tetradic

#103B5B #55105B #5B3010 #155B10

square

#103B5B #55105B #5B3010 #155B10

split-complementary

#103B5B #5B1015 #5B5510

monochromatic

#05111A #071927 #103B5B #195D8F #227EC3

Accessibility & contrast

On white

11.68

#103B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#103B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103B5B

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103B5B	#FFFFFF	#000000	##FFFFFF
##103B5B	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3C5C

Deuteranopia (green-blind)

#22355A

Tritanopia (blue-blind)

#004346

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #103b5b;
/* rgb */ color: rgb(16, 59, 91);
/* oklch */ color: oklch(34.0% 0.073 245.1);

Tailwind

colors: {
  custom: {
    50: '#5b7089',
    500: '#103b5b',
    950: '#000000',
  },
}

SCSS

$custom: #103b5b;
$custom-light: #5b7089;
$custom-dark: #000000;

JSON

{
  "hex": "#103b5b",
  "rgb": {
    "r": 16,
    "g": 59,
    "b": 91
  },
  "hsl": {
    "h": 205.6,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34044,
    "c": 0.07281,
    "h": 245.1
  },
  "luminance": 0.03993
}

Semantic roles & 50–950 ramp

primary

#103B5B

secondary

#945C33

accent

#873BED

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #103B5B

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

Preview Lab → · Contrast checker → · Palette generator →