#172D4E#172D4E

#172D4E is a dark, moderate blue. Relative luminance 0.026; OKLCH L 29.8% C 0.067 H 258.3°. Best body text is #FFFFFF at 13.80:1 contrast (WCAG AA passes).

Color values

HEX	#172D4E
RGB	rgb(23, 45, 78)
HSL	hsl(216, 54%, 20%)
HSV	hsv(216, 71%, 31%)
CMYK	cmyk(70.5%, 42.3%, 0%, 69.4%)
CIE-LAB	lab(18.40, 3.64, -22.92)
CIE-LCH	lch(18.40, 23.21, 279.01°)
OKLab	oklab(29.76% -0.0135 -0.0651)
OKLCH	oklch(29.76% 0.067 258.3)
XYZ	xyz(2.6664, 2.6087, 7.5693)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D4E #4E3817

analogous

#17494E #172D4E #1D174E

triadic

#172D4E #4E172D #2D4E17

tetradic

#172D4E #4E1749 #4E3817 #174E1D

square

#172D4E #4E1749 #4E3817 #174E1D

split-complementary

#172D4E #4E1D17 #494E17

monochromatic

#070E18 #09121F #172D4E #25487D #3364AD

Accessibility & contrast

On white

13.80

#172D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D4E

13.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D4E	#FFFFFF	#000000	##FFFFFF
##172D4E	1.00	13.80	1.52	13.80
#FFFFFF	13.80	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E304F

Deuteranopia (green-blind)

#172B4D

Tritanopia (blue-blind)

#003539

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172d4e;
/* rgb */ color: rgb(23, 45, 78);
/* oklch */ color: oklch(29.8% 0.067 258.3);

Tailwind

colors: {
  custom: {
    50: '#5b6580',
    500: '#172d4e',
    950: '#000000',
  },
}

SCSS

$custom: #172d4e;
$custom-light: #5b6580;
$custom-dark: #000000;

JSON

{
  "hex": "#172d4e",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 78
  },
  "hsl": {
    "h": 216,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.29757,
    "c": 0.06653,
    "h": 258.3
  },
  "luminance": 0.02609
}

Semantic roles & 50–950 ramp

primary

#172D4E

secondary

#85683C

accent

#A34ADE

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04050A

muted

#797A7C

Preview Lab

Preview with #172D4E

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

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