#171B7B#171B7B

#171B7B is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.157 H 270.6°. Best body text is #FFFFFF at 14.20:1 contrast (WCAG AA passes).

Color values

HEX	#171B7B
RGB	rgb(23, 27, 123)
HSL	hsl(238, 68%, 29%)
HSV	hsv(238, 81%, 48%)
CMYK	cmyk(81.3%, 78%, 0%, 51.8%)
CIE-LAB	lab(17.44, 34.29, -54.05)
CIE-LCH	lch(17.44, 64.01, 302.39°)
OKLab	oklab(30.28% 0.0016 -0.1565)
OKLCH	oklch(30.28% 0.157 270.6)
XYZ	xyz(4.3192, 2.3956, 18.9698)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B7B #7B7717

analogous

#174D7B #171B7B #45177B

triadic

#171B7B #7B171B #1B7B17

tetradic

#171B7B #7B174D #7B7717 #177B45

square

#171B7B #7B174D #7B7717 #177B45

split-complementary

#171B7B #7B4517 #4D7B17

monochromatic

#05061A #0D1047 #171B7B #2126AF #333AD9

Accessibility & contrast

On white

14.20

#171B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B7B

14.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B7B	#FFFFFF	#000000	##FFFFFF
##171B7B	1.00	14.20	1.48	14.20
#FFFFFF	14.20	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307E

Deuteranopia (green-blind)

#002679

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171b7b;
/* rgb */ color: rgb(23, 27, 123);
/* oklch */ color: oklch(30.3% 0.157 270.6);

Tailwind

colors: {
  custom: {
    50: '#6859a2',
    500: '#171b7b',
    950: '#000000',
  },
}

SCSS

$custom: #171b7b;
$custom-light: #6859a2;
$custom-dark: #000000;

JSON

{
  "hex": "#171b7b",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 123
  },
  "hsl": {
    "h": 237.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30278,
    "c": 0.15654,
    "h": 270.6
  },
  "luminance": 0.02396
}

Semantic roles & 50–950 ramp

primary

#171B7B

secondary

#B0AB3E

accent

#E43CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B7B

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

Preview Lab → · Contrast checker → · Palette generator →