#171B77#171B77

#171B77 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.8% C 0.151 H 270.9°. Best body text is #FFFFFF at 14.39:1 contrast (WCAG AA passes).

Color values

HEX	#171B77
RGB	rgb(23, 27, 119)
HSL	hsl(238, 68%, 28%)
HSV	hsv(238, 81%, 47%)
CMYK	cmyk(80.7%, 77.3%, 0%, 53.3%)
CIE-LAB	lab(16.98, 32.84, -52.25)
CIE-LCH	lch(16.98, 61.71, 302.15°)
OKLab	oklab(29.81% 0.0023 -0.1513)
OKLCH	oklch(29.81% 0.151 270.9)
XYZ	xyz(4.0739, 2.2975, 17.6779)
Luminance	0.0230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B77 #777317

analogous

#174B77 #171B77 #431777

triadic

#171B77 #77171B #1B7717

tetradic

#171B77 #77174B #777317 #177743

square

#171B77 #77174B #777317 #177743

split-complementary

#171B77 #774317 #4B7717

monochromatic

#05061A #0D0F44 #171B77 #2127AA #3138D7

Accessibility & contrast

On white

14.39

#171B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#171B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B77

14.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B77	#FFFFFF	#000000	##FFFFFF
##171B77	1.00	14.39	1.46	14.39
#FFFFFF	14.39	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7A

Deuteranopia (green-blind)

#002575

Tritanopia (blue-blind)

#003647

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171b77;
/* rgb */ color: rgb(23, 27, 119);
/* oklch */ color: oklch(29.8% 0.151 270.9);

Tailwind

colors: {
  custom: {
    50: '#67589f',
    500: '#171b77',
    950: '#000000',
  },
}

SCSS

$custom: #171b77;
$custom-light: #67589f;
$custom-dark: #000000;

JSON

{
  "hex": "#171b77",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 119
  },
  "hsl": {
    "h": 237.5,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.29812,
    "c": 0.15132,
    "h": 270.9
  },
  "luminance": 0.02298
}

Semantic roles & 50–950 ramp

primary

#171B77

secondary

#ACA83E

accent

#E33DEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030F

muted

#7A787E

Preview Lab

Preview with #171B77

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

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