#17478B#17478B

#17478B is a dark, vivid blue. Relative luminance 0.066; OKLCH L 40.6% C 0.124 H 258.0°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#17478B
RGB	rgb(23, 71, 139)
HSL	hsl(215, 72%, 32%)
HSV	hsv(215, 83%, 55%)
CMYK	cmyk(83.5%, 48.9%, 0%, 45.5%)
CIE-LAB	lab(30.76, 10.63, -42.33)
CIE-LCH	lch(30.76, 43.65, 284.09°)
OKLab	oklab(40.64% -0.0258 -0.1217)
OKLCH	oklch(40.64% 0.124 258)
XYZ	xyz(7.2651, 6.5518, 25.3028)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17478B #8B5B17

analogous

#17818B #17478B #21178B

triadic

#17478B #8B1747 #478B17

tetradic

#17478B #8B1781 #8B5B17 #178B21

square

#17478B #8B1781 #8B5B17 #178B21

split-complementary

#17478B #8B2117 #818B17

monochromatic

#061122 #0E2C56 #17478B #2062C0 #3D80DF

Accessibility & contrast

On white

9.09

#17478B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#17478B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17478B

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17478B	#FFFFFF	#000000	##FFFFFF
##17478B	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204E8E

Deuteranopia (green-blind)

#00448A

Tritanopia (blue-blind)

#005762

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #17478b;
/* rgb */ color: rgb(23, 71, 139);
/* oklch */ color: oklch(40.6% 0.124 258.0);

Tailwind

colors: {
  custom: {
    50: '#6979ad',
    500: '#17478b',
    950: '#000000',
  },
}

SCSS

$custom: #17478b;
$custom-light: #6979ad;
$custom-dark: #000000;

JSON

{
  "hex": "#17478b",
  "rgb": {
    "r": 23,
    "g": 71,
    "b": 139
  },
  "hsl": {
    "h": 215.172,
    "s": 71.605,
    "l": 31.765
  },
  "oklch": {
    "l": 0.40636,
    "c": 0.12439,
    "h": 258
  },
  "luminance": 0.06553
}

Semantic roles & 50–950 ramp

primary

#17478B

secondary

#BF8A3F

accent

#A339EE

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #17478B

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

Preview Lab → · Contrast checker → · Palette generator →