#172B7F#172B7F

#172B7F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.5% C 0.143 H 267.3°. Best body text is #FFFFFF at 12.44:1 contrast (WCAG AA passes).

Color values

HEX	#172B7F
RGB	rgb(23, 43, 127)
HSL	hsl(228, 69%, 29%)
HSV	hsv(228, 82%, 50%)
CMYK	cmyk(81.9%, 66.1%, 0%, 50.2%)
CIE-LAB	lab(21.73, 25.29, -49.52)
CIE-LCH	lch(21.73, 55.61, 297.05°)
OKLab	oklab(33.51% -0.0067 -0.1433)
OKLCH	oklch(33.51% 0.143 267.3)
XYZ	xyz(5.0467, 3.4416, 20.4729)
Luminance	0.0344 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B7F #7F6B17

analogous

#175F7F #172B7F #37177F

triadic

#172B7F #7F172B #2B7F17

tetradic

#172B7F #7F175F #7F6B17 #177F37

square

#172B7F #7F175F #7F6B17 #177F37

split-complementary

#172B7F #7F3717 #5F7F17

monochromatic

#05091A #0E194B #172B7F #203DB3 #3656DB

Accessibility & contrast

On white

12.44

#172B7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#172B7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B7F

12.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B7F	#FFFFFF	#000000	##FFFFFF
##172B7F	1.00	12.44	1.69	12.44
#FFFFFF	12.44	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003982

Deuteranopia (green-blind)

#002F7D

Tritanopia (blue-blind)

#004150

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172b7f;
/* rgb */ color: rgb(23, 43, 127);
/* oklch */ color: oklch(33.5% 0.143 267.3);

Tailwind

colors: {
  custom: {
    50: '#6864a5',
    500: '#172b7f',
    950: '#000000',
  },
}

SCSS

$custom: #172b7f;
$custom-light: #6864a5;
$custom-dark: #000000;

JSON

{
  "hex": "#172b7f",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 127
  },
  "hsl": {
    "h": 228.462,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.3351,
    "c": 0.14348,
    "h": 267.3
  },
  "luminance": 0.03442
}

Semantic roles & 50–950 ramp

primary

#172B7F

secondary

#B49D3E

accent

#CA3CEC

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172B7F

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

Preview Lab → · Contrast checker → · Palette generator →