#172D7F#172D7F

#172D7F is a dark, vivid blue. Relative luminance 0.036; OKLCH L 33.9% C 0.141 H 266.8°. Best body text is #FFFFFF at 12.22:1 contrast (WCAG AA passes).

Color values

HEX	#172D7F
RGB	rgb(23, 45, 127)
HSL	hsl(227, 69%, 29%)
HSV	hsv(227, 82%, 50%)
CMYK	cmyk(81.9%, 64.6%, 0%, 50.2%)
CIE-LAB	lab(22.27, 23.90, -48.64)
CIE-LCH	lch(22.27, 54.20, 296.16°)
OKLab	oklab(33.91% -0.008 -0.1407)
OKLCH	oklch(33.91% 0.141 266.8)
XYZ	xyz(5.1212, 3.5906, 20.4977)
Luminance	0.0359 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D7F #7F6917

analogous

#17617F #172D7F #35177F

triadic

#172D7F #7F172D #2D7F17

tetradic

#172D7F #7F1761 #7F6917 #177F35

square

#172D7F #7F1761 #7F6917 #177F35

split-complementary

#172D7F #7F3517 #617F17

monochromatic

#05091A #0E1B4B #172D7F #203FB3 #3659DB

Accessibility & contrast

On white

12.22

#172D7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#172D7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D7F

12.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D7F	#FFFFFF	#000000	##FFFFFF
##172D7F	1.00	12.22	1.72	12.22
#FFFFFF	12.22	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A82

Deuteranopia (green-blind)

#00307D

Tritanopia (blue-blind)

#004251

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172d7f;
/* rgb */ color: rgb(23, 45, 127);
/* oklch */ color: oklch(33.9% 0.141 266.8);

Tailwind

colors: {
  custom: {
    50: '#6765a5',
    500: '#172d7f',
    950: '#000000',
  },
}

SCSS

$custom: #172d7f;
$custom-light: #6765a5;
$custom-dark: #000000;

JSON

{
  "hex": "#172d7f",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 127
  },
  "hsl": {
    "h": 227.308,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.33907,
    "c": 0.14095,
    "h": 266.8
  },
  "luminance": 0.03591
}

Semantic roles & 50–950 ramp

primary

#172D7F

secondary

#B49B3E

accent

#C73CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172D7F

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

Preview Lab → · Contrast checker → · Palette generator →