#10355B#10355B

#10355B is a dark, moderate cyan. Relative luminance 0.034; OKLCH L 32.5% C 0.079 H 252.1°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#10355B
RGB	rgb(16, 53, 91)
HSL	hsl(210, 70%, 21%)
HSV	hsv(210, 82%, 36%)
CMYK	cmyk(82.4%, 41.8%, 0%, 64.3%)
CIE-LAB	lab(21.62, 2.17, -26.49)
CIE-LCH	lch(21.62, 26.58, 274.69°)
OKLab	oklab(32.45% -0.0244 -0.0756)
OKLCH	oklch(32.45% 0.079 252.1)
XYZ	xyz(3.3744, 3.4113, 10.3761)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10355B #5B3610

analogous

#105A5B #10355B #10105B

triadic

#10355B #5B1035 #355B10

tetradic

#10355B #5B105A #5B3610 #105B10

square

#10355B #5B105A #5B3610 #105B10

split-complementary

#10355B #5B1010 #5A5B10

monochromatic

#050F1A #071727 #10355B #19538F #2272C3

Accessibility & contrast

On white

12.48

#10355B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#10355B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10355B

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10355B	#FFFFFF	#000000	##FFFFFF
##10355B	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23385D

Deuteranopia (green-blind)

#17315A

Tritanopia (blue-blind)

#003E43

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #10355b;
/* rgb */ color: rgb(16, 53, 91);
/* oklch */ color: oklch(32.5% 0.079 252.1);

Tailwind

colors: {
  custom: {
    50: '#5b6b89',
    500: '#10355b',
    950: '#000000',
  },
}

SCSS

$custom: #10355b;
$custom-light: #5b6b89;
$custom-dark: #000000;

JSON

{
  "hex": "#10355b",
  "rgb": {
    "r": 16,
    "g": 53,
    "b": 91
  },
  "hsl": {
    "h": 210.4,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.32452,
    "c": 0.07941,
    "h": 252.1
  },
  "luminance": 0.03412
}

Semantic roles & 50–950 ramp

primary

#10355B

secondary

#946433

accent

#953BED

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#04060B

muted

#797A7C

Preview Lab

Preview with #10355B

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

Preview Lab → · Contrast checker → · Palette generator →