#104D5B#104D5B

#104D5B is a dark, moderate cyan. Relative luminance 0.062; OKLCH L 39.0% C 0.063 H 217.2°. Best body text is #FFFFFF at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#104D5B
RGB	rgb(16, 77, 91)
HSL	hsl(191, 70%, 21%)
HSV	hsv(191, 82%, 36%)
CMYK	cmyk(82.4%, 15.4%, 0%, 64.3%)
CIE-LAB	lab(29.84, -13.37, -13.64)
CIE-LCH	lch(29.84, 19.10, 225.58°)
OKLab	oklab(38.99% -0.0503 -0.0381)
OKLCH	oklch(38.99% 0.063 217.2)
XYZ	xyz(4.7551, 6.1727, 10.8363)
Luminance	0.0617 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#104D5B #5B1E10

analogous

#105B43 #104D5B #10275B

triadic

#104D5B #5B104D #4D5B10

tetradic

#104D5B #43105B #5B1E10 #275B10

square

#104D5B #43105B #5B1E10 #275B10

split-complementary

#104D5B #5B1027 #5B4310

monochromatic

#05161A #072127 #104D5B #19798F #22A5C3

Accessibility & contrast

On white

9.40

#104D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#104D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #104D5B

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##104D5B	#FFFFFF	#000000	##FFFFFF
##104D5B	1.00	9.40	2.23	9.40
#FFFFFF	9.40	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444A5C

Deuteranopia (green-blind)

#3A435B

Tritanopia (blue-blind)

#005251

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #104d5b;
/* rgb */ color: rgb(16, 77, 91);
/* oklch */ color: oklch(39.0% 0.063 217.2);

Tailwind

colors: {
  custom: {
    50: '#5c7f89',
    500: '#104d5b',
    950: '#000000',
  },
}

SCSS

$custom: #104d5b;
$custom-light: #5c7f89;
$custom-dark: #000000;

JSON

{
  "hex": "#104d5b",
  "rgb": {
    "r": 16,
    "g": 77,
    "b": 91
  },
  "hsl": {
    "h": 191.2,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.38985,
    "c": 0.06308,
    "h": 217.2
  },
  "luminance": 0.06173
}

Semantic roles & 50–950 ramp

primary

#104D5B

secondary

#944533

accent

#5C3BED

background

#F5F7F8

surface

#E9EEF0

border

#C5C9CB

text

#050A0B

muted

#797C7C

Preview Lab

Preview with #104D5B

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

Preview Lab → · Contrast checker → · Palette generator →