#173A54#173A54

#173A54 is a dark, moderate cyan. Relative luminance 0.038; OKLCH L 33.6% C 0.061 H 243.6°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#173A54
RGB	rgb(23, 58, 84)
HSL	hsl(206, 57%, 21%)
HSV	hsv(206, 73%, 33%)
CMYK	cmyk(72.6%, 31%, 0%, 67.1%)
CIE-LAB	lab(23.16, -3.00, -19.42)
CIE-LCH	lch(23.16, 19.65, 261.23°)
OKLab	oklab(33.6% -0.0272 -0.0548)
OKLCH	oklch(33.6% 0.061 243.6)
XYZ	xyz(3.4660, 3.8480, 8.9459)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A54 #543117

analogous

#17544F #173A54 #171B54

triadic

#173A54 #54173A #3A5417

tetradic

#173A54 #4F1754 #543117 #1B5417

square

#173A54 #4F1754 #543117 #1B5417

split-complementary

#173A54 #54171B #544F17

monochromatic

#071118 #0A1924 #173A54 #245B84 #317CB4

Accessibility & contrast

On white

11.87

#173A54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#173A54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A54

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A54	#FFFFFF	#000000	##FFFFFF
##173A54	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3B55

Deuteranopia (green-blind)

#263554

Tritanopia (blue-blind)

#004043

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a54;
/* rgb */ color: rgb(23, 58, 84);
/* oklch */ color: oklch(33.6% 0.061 243.6);

Tailwind

colors: {
  custom: {
    50: '#5c7084',
    500: '#173a54',
    950: '#000000',
  },
}

SCSS

$custom: #173a54;
$custom-light: #5c7084;
$custom-dark: #000000;

JSON

{
  "hex": "#173a54",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 84
  },
  "hsl": {
    "h": 205.574,
    "s": 57.009,
    "l": 20.98
  },
  "oklch": {
    "l": 0.33602,
    "c": 0.06117,
    "h": 243.6
  },
  "luminance": 0.03848
}

Semantic roles & 50–950 ramp

primary

#173A54

secondary

#8B5E3C

accent

#8948E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173A54

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

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