#1B179F#1B179F

#1B179F is a dark, highly saturated blue. Relative luminance 0.033; OKLCH L 34.4% C 0.203 H 269.9°. Best body text is #FFFFFF at 12.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B179F
RGB	rgb(27, 23, 159)
HSL	hsl(242, 75%, 36%)
HSV	hsv(242, 86%, 62%)
CMYK	cmyk(83%, 85.5%, 0%, 37.6%)
CIE-LAB	lab(21.39, 48.57, -69.98)
CIE-LCH	lch(21.39, 85.18, 304.76°)
OKLab	oklab(34.37% -0.0005 -0.2025)
OKLCH	oklch(34.37% 0.203 269.9)
XYZ	xyz(7.0143, 3.3482, 33.0707)
Luminance	0.0335 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B179F #9B9F17

analogous

#17579F #1B179F #5F179F

triadic

#1B179F #9F1B17 #179F1B

tetradic

#1B179F #9F1757 #9B9F17 #179F5F

square

#1B179F #9F1757 #9B9F17 #179F5F

split-complementary

#1B179F #9F5F17 #579F17

monochromatic

#090834 #120F6A #1B179F #241FD4 #504BE5

Accessibility & contrast

On white

12.58

#1B179F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B179F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B179F

12.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B179F	#FFFFFF	#000000	##FFFFFF
##1B179F	1.00	12.58	1.67	12.58
#FFFFFF	12.58	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003AA3

Deuteranopia (green-blind)

#002C9D

Tritanopia (blue-blind)

#00445E

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b179f;
/* rgb */ color: rgb(27, 23, 159);
/* oklch */ color: oklch(34.4% 0.203 269.9);

Tailwind

colors: {
  custom: {
    50: '#7359bd',
    500: '#1b179f',
    950: '#000000',
  },
}

SCSS

$custom: #1b179f;
$custom-light: #7359bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b179f",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 159
  },
  "hsl": {
    "h": 241.765,
    "s": 74.725,
    "l": 35.686
  },
  "oklch": {
    "l": 0.34373,
    "c": 0.20252,
    "h": 269.9
  },
  "luminance": 0.03349
}

Semantic roles & 50–950 ramp

primary

#1B179F

secondary

#C3C74B

accent

#F136EC

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B179F

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

Preview Lab → · Contrast checker → · Palette generator →