#17243B#17243B

#17243B is a dark, muted blue. Relative luminance 0.018; OKLCH L 26.1% C 0.047 H 261.2°. Best body text is #FFFFFF at 15.53:1 contrast (WCAG AA passes).

Color values

HEX	#17243B
RGB	rgb(23, 36, 59)
HSL	hsl(218, 44%, 16%)
HSV	hsv(218, 61%, 23%)
CMYK	cmyk(61%, 39%, 0%, 76.9%)
CIE-LAB	lab(14.17, 2.57, -16.52)
CIE-LCH	lch(14.17, 16.72, 278.83°)
OKLab	oklab(26.09% -0.0072 -0.0466)
OKLCH	oklch(26.09% 0.047 261.2)
XYZ	xyz(1.7734, 1.7595, 4.3830)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17243B #3B2E17

analogous

#17363B #17243B #1C173B

triadic

#17243B #3B1724 #243B17

tetradic

#17243B #3B1736 #3B2E17 #173B1C

square

#17243B #3B1736 #3B2E17 #173B1C

split-complementary

#17243B #3B1C17 #363B17

monochromatic

#090D16 #090D16 #17243B #283F67 #395A93

Accessibility & contrast

On white

15.53

#17243B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#17243B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17243B

15.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17243B	#FFFFFF	#000000	##FFFFFF
##17243B	1.00	15.53	1.35	15.53
#FFFFFF	15.53	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B263C

Deuteranopia (green-blind)

#17223B

Tritanopia (blue-blind)

#05292C

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #17243b;
/* rgb */ color: rgb(23, 36, 59);
/* oklch */ color: oklch(26.1% 0.047 261.2);

Tailwind

colors: {
  custom: {
    50: '#575e71',
    500: '#17243b',
    950: '#000000',
  },
}

SCSS

$custom: #17243b;
$custom-light: #575e71;
$custom-dark: #000000;

JSON

{
  "hex": "#17243b",
  "rgb": {
    "r": 23,
    "g": 36,
    "b": 59
  },
  "hsl": {
    "h": 218.333,
    "s": 43.902,
    "l": 16.078
  },
  "oklch": {
    "l": 0.26085,
    "c": 0.04713,
    "h": 261.2
  },
  "luminance": 0.0176
}

Semantic roles & 50–950 ramp

primary

#17243B

secondary

#725E3C

accent

#A654D4

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030407

muted

#78797A

Preview Lab

Preview with #17243B

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

Preview Lab → · Contrast checker → · Palette generator →