#17104B#17104B

#17104B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.0% C 0.103 H 279.9°. Best body text is #FFFFFF at 17.32:1 contrast (WCAG AA passes).

Color values

HEX	#17104B
RGB	rgb(23, 16, 75)
HSL	hsl(247, 65%, 18%)
HSV	hsv(247, 79%, 29%)
CMYK	cmyk(69.3%, 78.7%, 0%, 70.6%)
CIE-LAB	lab(9.49, 23.62, -35.27)
CIE-LCH	lch(9.49, 42.45, 303.81°)
OKLab	oklab(22.99% 0.0177 -0.1017)
OKLCH	oklch(22.99% 0.103 279.9)
XYZ	xyz(1.8082, 1.0606, 6.7647)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17104B #444B10

analogous

#10264B #17104B #34104B

triadic

#17104B #4B1710 #104B17

tetradic

#17104B #4B1026 #444B10 #104B34

square

#17104B #4B1026 #444B10 #104B34

split-complementary

#17104B #4B3410 #264B10

monochromatic

#080519 #080519 #17104B #261B7D #3626B0

Accessibility & contrast

On white

17.32

#17104B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#17104B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17104B

17.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17104B	#FFFFFF	#000000	##FFFFFF
##17104B	1.00	17.32	1.21	17.32
#FFFFFF	17.32	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D4D

Deuteranopia (green-blind)

#00184A

Tritanopia (blue-blind)

#00202C

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #17104b;
/* rgb */ color: rgb(23, 16, 75);
/* oklch */ color: oklch(23.0% 0.103 279.9);

Tailwind

colors: {
  custom: {
    50: '#5c4f7e',
    500: '#17104b',
    950: '#000000',
  },
}

SCSS

$custom: #17104b;
$custom-light: #5c4f7e;
$custom-dark: #000000;

JSON

{
  "hex": "#17104b",
  "rgb": {
    "r": 23,
    "g": 16,
    "b": 75
  },
  "hsl": {
    "h": 247.119,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.22989,
    "c": 0.10326,
    "h": 279.9
  },
  "luminance": 0.01061
}

Semantic roles & 50–950 ramp

primary

#17104B

secondary

#7B8532

accent

#E840D4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04020A

muted

#79787C

Preview Lab

Preview with #17104B

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

Preview Lab → · Contrast checker → · Palette generator →