#172C7F#172C7F

#172C7F is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.7% C 0.142 H 267.0°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#172C7F
RGB	rgb(23, 44, 127)
HSL	hsl(228, 69%, 29%)
HSV	hsv(228, 82%, 50%)
CMYK	cmyk(81.9%, 65.4%, 0%, 50.2%)
CIE-LAB	lab(22.00, 24.59, -49.09)
CIE-LCH	lch(22.00, 54.90, 296.61°)
OKLab	oklab(33.71% -0.0073 -0.142)
OKLCH	oklch(33.71% 0.142 267)
XYZ	xyz(5.0835, 3.5152, 20.4851)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C7F #7F6A17

analogous

#17607F #172C7F #36177F

triadic

#172C7F #7F172C #2C7F17

tetradic

#172C7F #7F1760 #7F6A17 #177F36

square

#172C7F #7F1760 #7F6A17 #177F36

split-complementary

#172C7F #7F3617 #607F17

monochromatic

#05091A #0E1A4B #172C7F #203EB3 #3657DB

Accessibility & contrast

On white

12.33

#172C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#172C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C7F

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C7F	#FFFFFF	#000000	##FFFFFF
##172C7F	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	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: #172c7f;
/* rgb */ color: rgb(23, 44, 127);
/* oklch */ color: oklch(33.7% 0.142 267.0);

Tailwind

colors: {
  custom: {
    50: '#6764a5',
    500: '#172c7f',
    950: '#000000',
  },
}

SCSS

$custom: #172c7f;
$custom-light: #6764a5;
$custom-dark: #000000;

JSON

{
  "hex": "#172c7f",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 127
  },
  "hsl": {
    "h": 227.885,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.33708,
    "c": 0.14222,
    "h": 267
  },
  "luminance": 0.03516
}

Semantic roles & 50–950 ramp

primary

#172C7F

secondary

#B49C3E

accent

#C93CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172C7F

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

Preview Lab → · Contrast checker → · Palette generator →