#173B5F#173B5F

#173B5F is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.6% C 0.076 H 250.9°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#173B5F
RGB	rgb(23, 59, 95)
HSL	hsl(210, 61%, 23%)
HSV	hsv(210, 76%, 37%)
CMYK	cmyk(75.8%, 37.9%, 0%, 62.7%)
CIE-LAB	lab(24.12, 0.75, -25.13)
CIE-LCH	lch(24.12, 25.14, 271.70°)
OKLab	oklab(34.55% -0.0247 -0.0714)
OKLCH	oklch(34.55% 0.076 250.9)
XYZ	xyz(3.9821, 4.1359, 11.4127)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B5F #5F3B17

analogous

#175F5F #173B5F #17175F

triadic

#173B5F #5F173B #3B5F17

tetradic

#173B5F #5F175F #5F3B17 #175F17

square

#173B5F #5F175F #5F3B17 #175F17

split-complementary

#173B5F #5F1717 #5F5F17

monochromatic

#060F19 #0B1C2E #173B5F #235A90 #2F78C2

Accessibility & contrast

On white

11.49

#173B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#173B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B5F

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B5F	#FFFFFF	#000000	##FFFFFF
##173B5F	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3D60

Deuteranopia (green-blind)

#20365E

Tritanopia (blue-blind)

#004348

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173b5f;
/* rgb */ color: rgb(23, 59, 95);
/* oklch */ color: oklch(34.6% 0.076 250.9);

Tailwind

colors: {
  custom: {
    50: '#5e708c',
    500: '#173b5f',
    950: '#000000',
  },
}

SCSS

$custom: #173b5f;
$custom-light: #5e708c;
$custom-dark: #000000;

JSON

{
  "hex": "#173b5f",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 95
  },
  "hsl": {
    "h": 210,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.34554,
    "c": 0.07555,
    "h": 250.9
  },
  "luminance": 0.04136
}

Semantic roles & 50–950 ramp

primary

#173B5F

secondary

#96693C

accent

#9444E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173B5F

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

Preview Lab → · Contrast checker → · Palette generator →