#1B177D#1B177D

#1B177D is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.2% C 0.162 H 272.7°. Best body text is #FFFFFF at 14.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B177D
RGB	rgb(27, 23, 125)
HSL	hsl(242, 69%, 29%)
HSV	hsv(242, 82%, 49%)
CMYK	cmyk(78.4%, 81.6%, 0%, 51%)
CIE-LAB	lab(17.11, 37.60, -55.86)
CIE-LCH	lch(17.11, 67.33, 303.95°)
OKLab	oklab(30.18% 0.0075 -0.1616)
OKLCH	oklch(30.18% 0.162 272.7)
XYZ	xyz(4.4588, 2.3260, 19.6120)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B177D #797D17

analogous

#17467D #1B177D #4E177D

triadic

#1B177D #7D1B17 #177D1B

tetradic

#1B177D #7D1746 #797D17 #177D4E

square

#1B177D #7D1746 #797D17 #177D4E

split-complementary

#1B177D #7D4E17 #467D17

monochromatic

#06051A #100D49 #1B177D #2621B1 #3B35DA

Accessibility & contrast

On white

14.33

#1B177D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B177D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B177D

14.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B177D	#FFFFFF	#000000	##FFFFFF
##1B177D	1.00	14.33	1.47	14.33
#FFFFFF	14.33	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F80

Deuteranopia (green-blind)

#00257B

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b177d;
/* rgb */ color: rgb(27, 23, 125);
/* oklch */ color: oklch(30.2% 0.162 272.7);

Tailwind

colors: {
  custom: {
    50: '#6a56a4',
    500: '#1b177d',
    950: '#000000',
  },
}

SCSS

$custom: #1b177d;
$custom-light: #6a56a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b177d",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 125
  },
  "hsl": {
    "h": 242.353,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30181,
    "c": 0.16182,
    "h": 272.7
  },
  "luminance": 0.02326
}

Semantic roles & 50–950 ramp

primary

#1B177D

secondary

#ADB23E

accent

#EC3CE5

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1B177D

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

Preview Lab → · Contrast checker → · Palette generator →