#103F5B#103F5B

#103F5B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.1% C 0.069 H 239.7°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#103F5B
RGB	rgb(16, 63, 91)
HSL	hsl(202, 70%, 21%)
HSV	hsv(202, 82%, 36%)
CMYK	cmyk(82.4%, 30.8%, 0%, 64.3%)
CIE-LAB	lab(25.01, -4.64, -21.13)
CIE-LCH	lch(25.01, 21.63, 257.61°)
OKLab	oklab(35.12% -0.0349 -0.0598)
OKLCH	oklch(35.12% 0.069 239.7)
XYZ	xyz(3.8788, 4.4200, 10.5442)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103F5B #5B2C10

analogous

#105B51 #103F5B #10195B

triadic

#103F5B #5B103F #3F5B10

tetradic

#103F5B #51105B #5B2C10 #195B10

square

#103F5B #51105B #5B2C10 #195B10

split-complementary

#103F5B #5B1019 #5B5110

monochromatic

#05121A #071B27 #103F5B #19638F #2287C3

Accessibility & contrast

On white

11.15

#103F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#103F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103F5B

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103F5B	#FFFFFF	#000000	##FFFFFF
##103F5B	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323F5C

Deuteranopia (green-blind)

#28385B

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #103f5b;
/* rgb */ color: rgb(16, 63, 91);
/* oklch */ color: oklch(35.1% 0.069 239.7);

Tailwind

colors: {
  custom: {
    50: '#5b7389',
    500: '#103f5b',
    950: '#000000',
  },
}

SCSS

$custom: #103f5b;
$custom-light: #5b7389;
$custom-dark: #000000;

JSON

{
  "hex": "#103f5b",
  "rgb": {
    "r": 16,
    "g": 63,
    "b": 91
  },
  "hsl": {
    "h": 202.4,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.35124,
    "c": 0.06919,
    "h": 239.7
  },
  "luminance": 0.04421
}

Semantic roles & 50–950 ramp

primary

#103F5B

secondary

#945733

accent

#7D3BED

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#04080B

muted

#797B7C

Preview Lab

Preview with #103F5B

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

Preview Lab → · Contrast checker → · Palette generator →