#173F74#173F74

#173F74 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 37.0% C 0.101 H 256.7°. Best body text is #FFFFFF at 10.50:1 contrast (WCAG AA passes).

Color values

HEX	#173F74
RGB	rgb(23, 63, 116)
HSL	hsl(214, 67%, 27%)
HSV	hsv(214, 80%, 45%)
CMYK	cmyk(80.2%, 45.7%, 0%, 54.5%)
CIE-LAB	lab(26.73, 6.64, -34.46)
CIE-LCH	lch(26.73, 35.09, 280.90°)
OKLab	oklab(37.02% -0.0233 -0.0987)
OKLCH	oklch(37.02% 0.101 256.7)
XYZ	xyz(5.2821, 4.9975, 17.2058)
Luminance	0.0500 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F74 #744C17

analogous

#176D74 #173F74 #1E1774

triadic

#173F74 #74173F #3F7417

tetradic

#173F74 #74176D #744C17 #17741E

square

#173F74 #74176D #744C17 #17741E

split-complementary

#173F74 #741E17 #6D7417

monochromatic

#050E1A #0D2341 #173F74 #215BA7 #3077D6

Accessibility & contrast

On white

10.50

#173F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F74

10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F74	#FFFFFF	#000000	##FFFFFF
##173F74	1.00	10.50	2.00	10.50
#FFFFFF	10.50	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244476

Deuteranopia (green-blind)

#123B73

Tritanopia (blue-blind)

#004C53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173f74;
/* rgb */ color: rgb(23, 63, 116);
/* oklch */ color: oklch(37.0% 0.101 256.7);

Tailwind

colors: {
  custom: {
    50: '#63739c',
    500: '#173f74',
    950: '#000000',
  },
}

SCSS

$custom: #173f74;
$custom-light: #63739c;
$custom-dark: #000000;

JSON

{
  "hex": "#173f74",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 116
  },
  "hsl": {
    "h": 214.194,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.37016,
    "c": 0.10141,
    "h": 256.7
  },
  "luminance": 0.04998
}

Semantic roles & 50–950 ramp

primary

#173F74

secondary

#A97B3D

accent

#A03EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F74

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

Preview Lab → · Contrast checker → · Palette generator →