#17103B#17103B

#17103B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.3% C 0.079 H 284.9°. Best body text is #FFFFFF at 17.89:1 contrast (WCAG AA passes).

Color values

HEX	#17103B
RGB	rgb(23, 16, 59)
HSL	hsl(250, 57%, 15%)
HSV	hsv(250, 73%, 23%)
CMYK	cmyk(61%, 72.9%, 0%, 76.9%)
CIE-LAB	lab(7.84, 17.64, -26.65)
CIE-LCH	lch(7.84, 31.96, 303.51°)
OKLab	oklab(21.3% 0.0204 -0.0765)
OKLCH	oklch(21.3% 0.079 284.9)
XYZ	xyz(1.3278, 0.8684, 4.2345)
Luminance	0.0087 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17103B #343B10

analogous

#101F3B #17103B #2C103B

triadic

#17103B #3B1710 #103B17

tetradic

#17103B #3B101F #343B10 #103B2C

square

#17103B #3B101F #343B10 #103B2C

split-complementary

#17103B #3B2C10 #1F3B10

monochromatic

#090718 #090718 #17103B #2A1D6B #3D2A9B

Accessibility & contrast

On white

17.89

#17103B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#17103B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17103B

17.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17103B	#FFFFFF	#000000	##FFFFFF
##17103B	1.00	17.89	1.17	17.89
#FFFFFF	17.89	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00183C

Deuteranopia (green-blind)

#00163A

Tritanopia (blue-blind)

#081A23

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #17103b;
/* rgb */ color: rgb(23, 16, 59);
/* oklch */ color: oklch(21.3% 0.079 284.9);

Tailwind

colors: {
  custom: {
    50: '#584e71',
    500: '#17103b',
    950: '#000000',
  },
}

SCSS

$custom: #17103b;
$custom-light: #584e71;
$custom-dark: #000000;

JSON

{
  "hex": "#17103b",
  "rgb": {
    "r": 23,
    "g": 16,
    "b": 59
  },
  "hsl": {
    "h": 249.767,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.213,
    "c": 0.07913,
    "h": 284.9
  },
  "luminance": 0.00869
}

Semantic roles & 50–950 ramp

primary

#17103B

secondary

#6A7532

accent

#E147C8

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#040108

muted

#79777B

Preview Lab

Preview with #17103B

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

Preview Lab → · Contrast checker → · Palette generator →