#17398F#17398F

#17398F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.148 H 264.1°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#17398F
RGB	rgb(23, 57, 143)
HSL	hsl(223, 72%, 33%)
HSV	hsv(223, 84%, 56%)
CMYK	cmyk(83.9%, 60.1%, 0%, 43.9%)
CIE-LAB	lab(26.99, 21.98, -50.91)
CIE-LCH	lch(26.99, 55.46, 293.35°)
OKLab	oklab(37.87% -0.0152 -0.1472)
OKLCH	oklch(37.87% 0.148 264.1)
XYZ	xyz(6.7726, 5.0908, 26.6069)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17398F #8F6D17

analogous

#17758F #17398F #31178F

triadic

#17398F #8F1739 #398F17

tetradic

#17398F #8F1775 #8F6D17 #178F31

square

#17398F #8F1775 #8F6D17 #178F31

split-complementary

#17398F #8F3117 #758F17

monochromatic

#060F26 #0F245A #17398F #1F4EC4 #406DE0

Accessibility & contrast

On white

10.40

#17398F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#17398F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17398F

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17398F	#FFFFFF	#000000	##FFFFFF
##17398F	1.00	10.40	2.02	10.40
#FFFFFF	10.40	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003A8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #17398f;
/* rgb */ color: rgb(23, 57, 143);
/* oklch */ color: oklch(37.9% 0.148 264.1);

Tailwind

colors: {
  custom: {
    50: '#6b6eb1',
    500: '#17398f',
    950: '#000000',
  },
}

SCSS

$custom: #17398f;
$custom-light: #6b6eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#17398f",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 143
  },
  "hsl": {
    "h": 223,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37866,
    "c": 0.14799,
    "h": 264.1
  },
  "luminance": 0.05092
}

Semantic roles & 50–950 ramp

primary

#17398F

secondary

#C19D41

accent

#BB39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #17398F

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

Preview Lab → · Contrast checker → · Palette generator →