#1B175B#1B175B

#1B175B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.3% C 0.116 H 277.3°. Best body text is #FFFFFF at 15.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B175B
RGB	rgb(27, 23, 91)
HSL	hsl(244, 60%, 22%)
HSV	hsv(244, 75%, 36%)
CMYK	cmyk(70.3%, 74.7%, 0%, 64.3%)
CIE-LAB	lab(13.24, 25.52, -40.02)
CIE-LCH	lch(13.24, 47.47, 302.53°)
OKLab	oklab(26.28% 0.0149 -0.1155)
OKLCH	oklch(26.28% 0.116 277.3)
XYZ	xyz(2.6461, 1.6009, 10.0651)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B175B #575B17

analogous

#17355B #1B175B #3D175B

triadic

#1B175B #5B1B17 #175B1B

tetradic

#1B175B #5B1735 #575B17 #175B3D

square

#1B175B #5B1735 #575B17 #175B3D

split-complementary

#1B175B #5B3D17 #355B17

monochromatic

#070618 #0D0B2A #1B175B #29238C #3830BD

Accessibility & contrast

On white

15.91

#1B175B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#1B175B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B175B

15.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B175B	#FFFFFF	#000000	##FFFFFF
##1B175B	1.00	15.91	1.32	15.91
#FFFFFF	15.91	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255D

Deuteranopia (green-blind)

#001F5A

Tritanopia (blue-blind)

#002937

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1b175b;
/* rgb */ color: rgb(27, 23, 91);
/* oklch */ color: oklch(26.3% 0.116 277.3);

Tailwind

colors: {
  custom: {
    50: '#61548a',
    500: '#1b175b',
    950: '#000000',
  },
}

SCSS

$custom: #1b175b;
$custom-light: #61548a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b175b",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 91
  },
  "hsl": {
    "h": 243.529,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26285,
    "c": 0.11649,
    "h": 277.3
  },
  "luminance": 0.01601
}

Semantic roles & 50–950 ramp

primary

#1B175B

secondary

#8D923C

accent

#E345DA

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1B175B

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

Preview Lab → · Contrast checker → · Palette generator →