#173B70#173B70

#173B70 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.7% C 0.101 H 258.3°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#173B70
RGB	rgb(23, 59, 112)
HSL	hsl(216, 66%, 26%)
HSV	hsv(216, 79%, 44%)
CMYK	cmyk(79.5%, 47.3%, 0%, 56.1%)
CIE-LAB	lab(25.20, 7.77, -34.37)
CIE-LCH	lch(25.20, 35.24, 282.73°)
OKLab	oklab(35.75% -0.0204 -0.0985)
OKLCH	oklch(35.75% 0.101 258.3)
XYZ	xyz(4.8409, 4.4794, 15.9356)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B70 #704C17

analogous

#176870 #173B70 #1F1770

triadic

#173B70 #70173B #3B7017

tetradic

#173B70 #701768 #704C17 #17701F

square

#173B70 #701768 #704C17 #17701F

split-complementary

#173B70 #701F17 #687017

monochromatic

#050D19 #0D203D #173B70 #2156A3 #2D71D4

Accessibility & contrast

On white

11.08

#173B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B70

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B70	#FFFFFF	#000000	##FFFFFF
##173B70	1.00	11.08	1.90	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204072

Deuteranopia (green-blind)

#0D386F

Tritanopia (blue-blind)

#004850

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173b70;
/* rgb */ color: rgb(23, 59, 112);
/* oklch */ color: oklch(35.7% 0.101 258.3);

Tailwind

colors: {
  custom: {
    50: '#627099',
    500: '#173b70',
    950: '#000000',
  },
}

SCSS

$custom: #173b70;
$custom-light: #627099;
$custom-dark: #000000;

JSON

{
  "hex": "#173b70",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 112
  },
  "hsl": {
    "h": 215.73,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35746,
    "c": 0.1006,
    "h": 258.3
  },
  "luminance": 0.0448
}

Semantic roles & 50–950 ramp

primary

#173B70

secondary

#A67B3D

accent

#A43FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B70

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

Preview Lab → · Contrast checker → · Palette generator →