#1B177A#1B177A

#1B177A is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.8% C 0.158 H 273.0°. Best body text is #FFFFFF at 14.48:1 contrast (WCAG AA passes).

Color values

HEX	#1B177A
RGB	rgb(27, 23, 122)
HSL	hsl(242, 68%, 28%)
HSV	hsv(242, 81%, 48%)
CMYK	cmyk(77.9%, 81.1%, 0%, 52.2%)
CIE-LAB	lab(16.75, 36.58, -54.54)
CIE-LCH	lch(16.75, 65.67, 303.85°)
OKLab	oklab(29.82% 0.0082 -0.1578)
OKLCH	oklch(29.82% 0.158 273)
XYZ	xyz(4.2701, 2.2505, 18.6179)
Luminance	0.0225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B177A #767A17

analogous

#17447A #1B177A #4C177A

triadic

#1B177A #7A1B17 #177A1B

tetradic

#1B177A #7A1744 #767A17 #177A4C

square

#1B177A #7A1744 #767A17 #177A4C

split-complementary

#1B177A #7A4C17 #447A17

monochromatic

#06051A #100D47 #1B177A #2621AD #3A33D9

Accessibility & contrast

On white

14.48

#1B177A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B177A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B177A

14.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B177A	#FFFFFF	#000000	##FFFFFF
##1B177A	1.00	14.48	1.45	14.48
#FFFFFF	14.48	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7D

Deuteranopia (green-blind)

#002478

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b177a;
/* rgb */ color: rgb(27, 23, 122);
/* oklch */ color: oklch(29.8% 0.158 273.0);

Tailwind

colors: {
  custom: {
    50: '#6956a2',
    500: '#1b177a',
    950: '#000000',
  },
}

SCSS

$custom: #1b177a;
$custom-light: #6956a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b177a",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 122
  },
  "hsl": {
    "h": 242.424,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.29822,
    "c": 0.15803,
    "h": 273
  },
  "luminance": 0.02251
}

Semantic roles & 50–950 ramp

primary

#1B177A

secondary

#AAAF3E

accent

#EB3DE4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B177A

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

Preview Lab → · Contrast checker → · Palette generator →