#13173B#13173B

#13173B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.5% C 0.069 H 274.7°. Best body text is #FFFFFF at 17.31:1 contrast (WCAG AA passes).

Color values

HEX	#13173B
RGB	rgb(19, 23, 59)
HSL	hsl(234, 51%, 15%)
HSV	hsv(234, 68%, 23%)
CMYK	cmyk(67.8%, 61%, 0%, 76.9%)
CIE-LAB	lab(9.54, 11.44, -23.93)
CIE-LCH	lch(9.54, 26.52, 295.55°)
OKLab	oklab(22.46% 0.0056 -0.0685)
OKLCH	oklch(22.46% 0.069 274.7)
XYZ	xyz(1.3641, 1.0669, 4.2709)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#13173B #3B3713

analogous

#132B3B #13173B #23133B

triadic

#13173B #3B1317 #173B13

tetradic

#13173B #3B132B #3B3713 #133B23

square

#13173B #3B132B #3B3713 #133B23

split-complementary

#13173B #3B2313 #2B3B13

monochromatic

#070917 #070917 #13173B #222969 #313B98

Accessibility & contrast

On white

17.31

#13173B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#13173B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #13173B

17.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##13173B	#FFFFFF	#000000	##FFFFFF
##13173B	1.00	17.31	1.21	17.31
#FFFFFF	17.31	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031C3C

Deuteranopia (green-blind)

#00193A

Tritanopia (blue-blind)

#001F26

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #13173b;
/* rgb */ color: rgb(19, 23, 59);
/* oklch */ color: oklch(22.5% 0.069 274.7);

Tailwind

colors: {
  custom: {
    50: '#555371',
    500: '#13173b',
    950: '#000000',
  },
}

SCSS

$custom: #13173b;
$custom-light: #555371;
$custom-dark: #000000;

JSON

{
  "hex": "#13173b",
  "rgb": {
    "r": 19,
    "g": 23,
    "b": 59
  },
  "hsl": {
    "h": 234,
    "s": 51.282,
    "l": 15.294
  },
  "oklch": {
    "l": 0.22458,
    "c": 0.06876,
    "h": 274.7
  },
  "luminance": 0.01067
}

Semantic roles & 50–950 ramp

primary

#13173B

secondary

#736D36

accent

#CD4DDB

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #13173B

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

Preview Lab → · Contrast checker → · Palette generator →