#133F5B#133F5B

#133F5B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.068 H 240.8°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#133F5B
RGB	rgb(19, 63, 91)
HSL	hsl(203, 65%, 22%)
HSV	hsv(203, 79%, 36%)
CMYK	cmyk(79.1%, 30.8%, 0%, 64.3%)
CIE-LAB	lab(25.10, -4.21, -20.99)
CIE-LCH	lch(25.10, 21.40, 258.66°)
OKLab	oklab(35.22% -0.0331 -0.0593)
OKLCH	oklch(35.22% 0.068 240.8)
XYZ	xyz(3.9337, 4.4483, 10.5468)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133F5B #5B2F13

analogous

#135B53 #133F5B #131B5B

triadic

#133F5B #5B133F #3F5B13

tetradic

#133F5B #53135B #5B2F13 #1B5B13

square

#133F5B #53135B #5B2F13 #1B5B13

split-complementary

#133F5B #5B131B #5B5313

monochromatic

#051219 #081C28 #133F5B #1E628E #2885C0

Accessibility & contrast

On white

11.11

#133F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#133F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133F5B

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133F5B	#FFFFFF	#000000	##FFFFFF
##133F5B	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323F5C

Deuteranopia (green-blind)

#28385A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #133f5b;
/* rgb */ color: rgb(19, 63, 91);
/* oklch */ color: oklch(35.2% 0.068 240.8);

Tailwind

colors: {
  custom: {
    50: '#5c7389',
    500: '#133f5b',
    950: '#000000',
  },
}

SCSS

$custom: #133f5b;
$custom-light: #5c7389;
$custom-dark: #000000;

JSON

{
  "hex": "#133f5b",
  "rgb": {
    "r": 19,
    "g": 63,
    "b": 91
  },
  "hsl": {
    "h": 203.333,
    "s": 65.455,
    "l": 21.569
  },
  "oklch": {
    "l": 0.35219,
    "c": 0.06794,
    "h": 240.8
  },
  "luminance": 0.04449
}

Semantic roles & 50–950 ramp

primary

#133F5B

secondary

#935B37

accent

#813FE8

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #133F5B

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

Preview Lab → · Contrast checker → · Palette generator →