#103D5B#103D5B

#103D5B is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.071 H 242.5°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#103D5B
RGB	rgb(16, 61, 91)
HSL	hsl(204, 70%, 21%)
HSV	hsv(204, 82%, 36%)
CMYK	cmyk(82.4%, 33%, 0%, 64.3%)
CIE-LAB	lab(24.33, -3.32, -22.20)
CIE-LCH	lch(24.33, 22.45, 261.50°)
OKLab	oklab(34.58% -0.0327 -0.0629)
OKLCH	oklch(34.58% 0.071 242.5)
XYZ	xyz(3.7700, 4.2025, 10.5080)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103D5B #5B2E10

analogous

#105B53 #103D5B #10175B

triadic

#103D5B #5B103D #3D5B10

tetradic

#103D5B #53105B #5B2E10 #175B10

square

#103D5B #53105B #5B2E10 #175B10

split-complementary

#103D5B #5B1017 #5B5310

monochromatic

#05111A #071A27 #103D5B #19608F #2283C3

Accessibility & contrast

On white

11.41

#103D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#103D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103D5B

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103D5B	#FFFFFF	#000000	##FFFFFF
##103D5B	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3E5C

Deuteranopia (green-blind)

#25375A

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #103d5b;
/* rgb */ color: rgb(16, 61, 91);
/* oklch */ color: oklch(34.6% 0.071 242.5);

Tailwind

colors: {
  custom: {
    50: '#5b7289',
    500: '#103d5b',
    950: '#000000',
  },
}

SCSS

$custom: #103d5b;
$custom-light: #5b7289;
$custom-dark: #000000;

JSON

{
  "hex": "#103d5b",
  "rgb": {
    "r": 16,
    "g": 61,
    "b": 91
  },
  "hsl": {
    "h": 204,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34583,
    "c": 0.07091,
    "h": 242.5
  },
  "luminance": 0.04203
}

Semantic roles & 50–950 ramp

primary

#103D5B

secondary

#945A33

accent

#823BED

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #103D5B

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

Preview Lab → · Contrast checker → · Palette generator →