#1B174E#1B174E

#1B174E is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.097 H 279.9°. Best body text is #FFFFFF at 16.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B174E
RGB	rgb(27, 23, 78)
HSL	hsl(244, 54%, 20%)
HSV	hsv(244, 71%, 31%)
CMYK	cmyk(65.4%, 70.5%, 0%, 69.4%)
CIE-LAB	lab(11.93, 20.65, -33.33)
CIE-LCH	lch(11.93, 39.21, 301.78°)
OKLab	oklab(24.94% 0.0168 -0.0959)
OKLCH	oklch(24.94% 0.097 279.9)
XYZ	xyz(2.1331, 1.3957, 7.3632)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B174E #4A4E17

analogous

#172E4E #1B174E #37174E

triadic

#1B174E #4E1B17 #174E1B

tetradic

#1B174E #4E172E #4A4E17 #174E37

square

#1B174E #4E172E #4A4E17 #174E37

split-complementary

#1B174E #4E3717 #2E4E17

monochromatic

#080718 #0B091F #1B174E #2B257D #3C33AD

Accessibility & contrast

On white

16.42

#1B174E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#1B174E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B174E

16.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B174E	#FFFFFF	#000000	##FFFFFF
##1B174E	1.00	16.42	1.28	16.42
#FFFFFF	16.42	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002150

Deuteranopia (green-blind)

#001D4D

Tritanopia (blue-blind)

#002530

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #1b174e;
/* rgb */ color: rgb(27, 23, 78);
/* oklch */ color: oklch(24.9% 0.097 279.9);

Tailwind

colors: {
  custom: {
    50: '#5e5480',
    500: '#1b174e',
    950: '#000000',
  },
}

SCSS

$custom: #1b174e;
$custom-light: #5e5480;
$custom-dark: #000000;

JSON

{
  "hex": "#1b174e",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 78
  },
  "hsl": {
    "h": 244.364,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.24939,
    "c": 0.09736,
    "h": 279.9
  },
  "luminance": 0.01396
}

Semantic roles & 50–950 ramp

primary

#1B174E

secondary

#80853C

accent

#DE4AD3

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #1B174E

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

Preview Lab → · Contrast checker → · Palette generator →