#173F70#173F70

#173F70 is a dark, moderate cyan. Relative luminance 0.049; OKLCH L 36.7% C 0.096 H 255.3°. Best body text is #FFFFFF at 10.60:1 contrast (WCAG AA passes).

Color values

HEX	#173F70
RGB	rgb(23, 63, 112)
HSL	hsl(213, 66%, 26%)
HSV	hsv(213, 79%, 44%)
CMYK	cmyk(79.5%, 43.7%, 0%, 56.1%)
CIE-LAB	lab(26.47, 4.98, -32.34)
CIE-LCH	lch(26.47, 32.72, 278.75°)
OKLab	oklab(36.73% -0.0242 -0.0925)
OKLCH	oklch(36.73% 0.096 255.3)
XYZ	xyz(5.0544, 4.9064, 16.0067)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F70 #704817

analogous

#176C70 #173F70 #1C1770

triadic

#173F70 #70173F #3F7017

tetradic

#173F70 #70176C #704817 #17701C

square

#173F70 #70176C #704817 #17701C

split-complementary

#173F70 #701C17 #6C7017

monochromatic

#050E19 #0D223D #173F70 #215CA3 #2D78D4

Accessibility & contrast

On white

10.60

#173F70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173F70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F70

10.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F70	#FFFFFF	#000000	##FFFFFF
##173F70	1.00	10.60	1.98	10.60
#FFFFFF	10.60	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274372

Deuteranopia (green-blind)

#183B6F

Tritanopia (blue-blind)

#004B52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173f70;
/* rgb */ color: rgb(23, 63, 112);
/* oklch */ color: oklch(36.7% 0.096 255.3);

Tailwind

colors: {
  custom: {
    50: '#627399',
    500: '#173f70',
    950: '#000000',
  },
}

SCSS

$custom: #173f70;
$custom-light: #627399;
$custom-dark: #000000;

JSON

{
  "hex": "#173f70",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 112
  },
  "hsl": {
    "h": 213.034,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.36729,
    "c": 0.09558,
    "h": 255.3
  },
  "luminance": 0.04907
}

Semantic roles & 50–950 ramp

primary

#173F70

secondary

#A6773D

accent

#9C3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F70

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

Preview Lab → · Contrast checker → · Palette generator →