#1B175A#1B175A

#1B175A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.2% C 0.115 H 277.5°. Best body text is #FFFFFF at 15.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B175A
RGB	rgb(27, 23, 90)
HSL	hsl(244, 59%, 22%)
HSV	hsv(244, 74%, 35%)
CMYK	cmyk(70%, 74.4%, 0%, 64.7%)
CIE-LAB	lab(13.13, 25.15, -39.52)
CIE-LCH	lch(13.13, 46.85, 302.47°)
OKLab	oklab(26.18% 0.0151 -0.1141)
OKLCH	oklch(26.18% 0.115 277.5)
XYZ	xyz(2.6033, 1.5838, 9.8394)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B175A #565A17

analogous

#17355A #1B175A #3D175A

triadic

#1B175A #5A1B17 #175A1B

tetradic

#1B175A #5A1735 #565A17 #175A3D

square

#1B175A #5A1735 #565A17 #175A3D

split-complementary

#1B175A #5A3D17 #355A17

monochromatic

#070618 #0C0B29 #1B175A #2A238B #3830BB

Accessibility & contrast

On white

15.95

#1B175A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#1B175A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B175A

15.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B175A	#FFFFFF	#000000	##FFFFFF
##1B175A	1.00	15.95	1.32	15.95
#FFFFFF	15.95	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255C

Deuteranopia (green-blind)

#001F59

Tritanopia (blue-blind)

#002936

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1b175a;
/* rgb */ color: rgb(27, 23, 90);
/* oklch */ color: oklch(26.2% 0.115 277.5);

Tailwind

colors: {
  custom: {
    50: '#615489',
    500: '#1b175a',
    950: '#000000',
  },
}

SCSS

$custom: #1b175a;
$custom-light: #615489;
$custom-dark: #000000;

JSON

{
  "hex": "#1b175a",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 90
  },
  "hsl": {
    "h": 243.582,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26178,
    "c": 0.11506,
    "h": 277.5
  },
  "luminance": 0.01584
}

Semantic roles & 50–950 ramp

primary

#1B175A

secondary

#8C913C

accent

#E245D9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #1B175A

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

Preview Lab → · Contrast checker → · Palette generator →