#1B175D#1B175D

#1B175D is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.5% C 0.119 H 277.0°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B175D
RGB	rgb(27, 23, 93)
HSL	hsl(243, 60%, 23%)
HSV	hsv(243, 75%, 36%)
CMYK	cmyk(71%, 75.3%, 0%, 63.5%)
CIE-LAB	lab(13.45, 26.26, -41.02)
CIE-LCH	lch(13.45, 48.71, 302.63°)
OKLab	oklab(26.5% 0.0145 -0.1184)
OKLCH	oklch(26.5% 0.119 277)
XYZ	xyz(2.7335, 1.6359, 10.5255)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B175D #595D17

analogous

#17365D #1B175D #3E175D

triadic

#1B175D #5D1B17 #175D1B

tetradic

#1B175D #5D1736 #595D17 #175D3E

square

#1B175D #5D1736 #595D17 #175D3E

split-complementary

#1B175D #5D3E17 #365D17

monochromatic

#070619 #0D0B2C #1B175D #29238E #372FBF

Accessibility & contrast

On white

15.82

#1B175D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1B175D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B175D

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B175D	#FFFFFF	#000000	##FFFFFF
##1B175D	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255F

Deuteranopia (green-blind)

#001F5C

Tritanopia (blue-blind)

#002A38

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1b175d;
/* rgb */ color: rgb(27, 23, 93);
/* oklch */ color: oklch(26.5% 0.119 277.0);

Tailwind

colors: {
  custom: {
    50: '#62558c',
    500: '#1b175d',
    950: '#000000',
  },
}

SCSS

$custom: #1b175d;
$custom-light: #62558c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b175d",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 93
  },
  "hsl": {
    "h": 243.429,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.26501,
    "c": 0.11933,
    "h": 277
  },
  "luminance": 0.01636
}

Semantic roles & 50–950 ramp

primary

#1B175D

secondary

#8F943C

accent

#E344DA

background

#F6F4F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1B175D

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

Preview Lab → · Contrast checker → · Palette generator →