#103F5C#103F5C

#103F5C is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.070 H 240.7°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#103F5C
RGB	rgb(16, 63, 92)
HSL	hsl(203, 70%, 21%)
HSV	hsv(203, 83%, 36%)
CMYK	cmyk(82.6%, 31.5%, 0%, 63.9%)
CIE-LAB	lab(25.07, -4.23, -21.70)
CIE-LCH	lch(25.07, 22.11, 258.96°)
OKLab	oklab(35.19% -0.0345 -0.0614)
OKLCH	oklch(35.19% 0.07 240.7)
XYZ	xyz(3.9222, 4.4374, 10.7729)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103F5C #5C2D10

analogous

#105C53 #103F5C #10195C

triadic

#103F5C #5C103F #3F5C10

tetradic

#103F5C #53105C #5C2D10 #195C10

square

#103F5C #53105C #5C2D10 #195C10

split-complementary

#103F5C #5C1019 #5C5310

monochromatic

#05121A #071B28 #103F5C #196390 #2286C4

Accessibility & contrast

On white

11.13

#103F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#103F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103F5C

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103F5C	#FFFFFF	#000000	##FFFFFF
##103F5C	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313F5D

Deuteranopia (green-blind)

#27385B

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #103f5c;
/* rgb */ color: rgb(16, 63, 92);
/* oklch */ color: oklch(35.2% 0.070 240.7);

Tailwind

colors: {
  custom: {
    50: '#5b738a',
    500: '#103f5c',
    950: '#000000',
  },
}

SCSS

$custom: #103f5c;
$custom-light: #5b738a;
$custom-dark: #000000;

JSON

{
  "hex": "#103f5c",
  "rgb": {
    "r": 16,
    "g": 63,
    "b": 92
  },
  "hsl": {
    "h": 202.895,
    "s": 70.37,
    "l": 21.176
  },
  "oklch": {
    "l": 0.35185,
    "c": 0.07044,
    "h": 240.7
  },
  "luminance": 0.04438
}

Semantic roles & 50–950 ramp

primary

#103F5C

secondary

#955833

accent

#7F3BED

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#04080B

muted

#797B7C

Preview Lab

Preview with #103F5C

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

Preview Lab → · Contrast checker → · Palette generator →