#17183D#17183D

#17183D is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.2% C 0.069 H 278.4°. Best body text is #FFFFFF at 17.01:1 contrast (WCAG AA passes).

Color values

HEX	#17183D
RGB	rgb(23, 24, 61)
HSL	hsl(238, 45%, 16%)
HSV	hsv(238, 62%, 24%)
CMYK	cmyk(62.3%, 60.7%, 0%, 76.1%)
CIE-LAB	lab(10.35, 12.44, -24.02)
CIE-LCH	lch(10.35, 27.05, 297.38°)
OKLab	oklab(23.21% 0.0101 -0.0687)
OKLCH	oklch(23.21% 0.069 278.4)
XYZ	xyz(1.5220, 1.1723, 4.5600)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17183D #3D3C17

analogous

#172B3D #17183D #29173D

triadic

#17183D #3D1718 #183D17

tetradic

#17183D #3D172B #3D3C17 #173D29

square

#17183D #3D172B #3D3C17 #173D29

split-complementary

#17183D #3D2917 #2B3D17

monochromatic

#080916 #080916 #17183D #282969 #393B96

Accessibility & contrast

On white

17.01

#17183D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#17183D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17183D

17.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17183D	#FFFFFF	#000000	##FFFFFF
##17183D	1.00	17.01	1.23	17.01
#FFFFFF	17.01	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041E3E

Deuteranopia (green-blind)

#011B3C

Tritanopia (blue-blind)

#062027

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #17183d;
/* rgb */ color: rgb(23, 24, 61);
/* oklch */ color: oklch(23.2% 0.069 278.4);

Tailwind

colors: {
  custom: {
    50: '#585473',
    500: '#17183d',
    950: '#000000',
  },
}

SCSS

$custom: #17183d;
$custom-light: #585473;
$custom-dark: #000000;

JSON

{
  "hex": "#17183d",
  "rgb": {
    "r": 23,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 238.421,
    "s": 45.238,
    "l": 16.471
  },
  "oklch": {
    "l": 0.23208,
    "c": 0.06941,
    "h": 278.4
  },
  "luminance": 0.01172
}

Semantic roles & 50–950 ramp

primary

#17183D

secondary

#74723C

accent

#D253D5

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #17183D

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

Preview Lab → · Contrast checker → · Palette generator →