#17284E#17284E

#17284E is a dark, moderate blue. Relative luminance 0.022; OKLCH L 28.5% C 0.073 H 264.2°. Best body text is #FFFFFF at 14.48:1 contrast (WCAG AA passes).

Color values

HEX	#17284E
RGB	rgb(23, 40, 78)
HSL	hsl(221, 54%, 20%)
HSV	hsv(221, 71%, 31%)
CMYK	cmyk(70.5%, 48.7%, 0%, 69.4%)
CIE-LAB	lab(16.75, 7.29, -25.56)
CIE-LCH	lch(16.75, 26.58, 285.92°)
OKLab	oklab(28.48% -0.0075 -0.073)
OKLCH	oklch(28.48% 0.073 264.2)
XYZ	xyz(2.4868, 2.2496, 7.5094)
Luminance	0.0225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17284E #4E3D17

analogous

#17434E #17284E #22174E

triadic

#17284E #4E1728 #284E17

tetradic

#17284E #4E1743 #4E3D17 #174E22

square

#17284E #4E1743 #4E3D17 #174E22

split-complementary

#17284E #4E2217 #434E17

monochromatic

#070C18 #09101F #17284E #25407D #3358AD

Accessibility & contrast

On white

14.48

#17284E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#17284E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17284E

14.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17284E	#FFFFFF	#000000	##FFFFFF
##17284E	1.00	14.48	1.45	14.48
#FFFFFF	14.48	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#162C4F

Deuteranopia (green-blind)

#0D274D

Tritanopia (blue-blind)

#003137

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #17284e;
/* rgb */ color: rgb(23, 40, 78);
/* oklch */ color: oklch(28.5% 0.073 264.2);

Tailwind

colors: {
  custom: {
    50: '#5b6180',
    500: '#17284e',
    950: '#000000',
  },
}

SCSS

$custom: #17284e;
$custom-light: #5b6180;
$custom-dark: #000000;

JSON

{
  "hex": "#17284e",
  "rgb": {
    "r": 23,
    "g": 40,
    "b": 78
  },
  "hsl": {
    "h": 221.455,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.28476,
    "c": 0.07335,
    "h": 264.2
  },
  "luminance": 0.0225
}

Semantic roles & 50–950 ramp

primary

#17284E

secondary

#856E3C

accent

#B04ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #17284E

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

Preview Lab → · Contrast checker → · Palette generator →