#172B71#172B71

#172B71 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.2% C 0.123 H 266.9°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#172B71
RGB	rgb(23, 43, 113)
HSL	hsl(227, 66%, 27%)
HSV	hsv(227, 80%, 44%)
CMYK	cmyk(79.6%, 61.9%, 0%, 55.7%)
CIE-LAB	lab(20.45, 19.63, -42.69)
CIE-LCH	lch(20.45, 46.99, 294.69°)
OKLab	oklab(32.16% -0.0067 -0.1233)
OKLCH	oklch(32.16% 0.123 266.9)
XYZ	xyz(4.1968, 3.1017, 15.9971)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B71 #715D17

analogous

#175871 #172B71 #301771

triadic

#172B71 #71172B #2B7117

tetradic

#172B71 #711758 #715D17 #177130

square

#172B71 #711758 #715D17 #177130

split-complementary

#172B71 #713017 #587117

monochromatic

#050A19 #0D183E #172B71 #213EA4 #2E53D4

Accessibility & contrast

On white

12.96

#172B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#172B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B71

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B71	#FFFFFF	#000000	##FFFFFF
##172B71	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003673

Deuteranopia (green-blind)

#002D70

Tritanopia (blue-blind)

#003D49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172b71;
/* rgb */ color: rgb(23, 43, 113);
/* oklch */ color: oklch(32.2% 0.123 266.9);

Tailwind

colors: {
  custom: {
    50: '#64649a',
    500: '#172b71',
    950: '#000000',
  },
}

SCSS

$custom: #172b71;
$custom-light: #64649a;
$custom-dark: #000000;

JSON

{
  "hex": "#172b71",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 113
  },
  "hsl": {
    "h": 226.667,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.3216,
    "c": 0.12349,
    "h": 266.9
  },
  "luminance": 0.03102
}

Semantic roles & 50–950 ramp

primary

#172B71

secondary

#A78F3D

accent

#C33FE9

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B71

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

Preview Lab → · Contrast checker → · Palette generator →