#1B175E#1B175E

#1B175E is a dark, vivid blue. Relative luminance 0.017; OKLCH L 26.6% C 0.121 H 276.8°. Best body text is #FFFFFF at 15.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B175E
RGB	rgb(27, 23, 94)
HSL	hsl(243, 61%, 23%)
HSV	hsv(243, 76%, 37%)
CMYK	cmyk(71.3%, 75.5%, 0%, 63.1%)
CIE-LAB	lab(13.55, 26.63, -41.51)
CIE-LCH	lch(13.55, 49.32, 302.68°)
OKLab	oklab(26.61% 0.0144 -0.1199)
OKLCH	oklch(26.61% 0.121 276.8)
XYZ	xyz(2.7781, 1.6537, 10.7603)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B175E #5A5E17

analogous

#17365E #1B175E #3E175E

triadic

#1B175E #5E1B17 #175E1B

tetradic

#1B175E #5E1736 #5A5E17 #175E3E

square

#1B175E #5E1736 #5A5E17 #175E3E

split-complementary

#1B175E #5E3E17 #365E17

monochromatic

#070619 #0D0B2D #1B175E #29238F #372FC0

Accessibility & contrast

On white

15.78

#1B175E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1B175E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B175E

15.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B175E	#FFFFFF	#000000	##FFFFFF
##1B175E	1.00	15.78	1.33	15.78
#FFFFFF	15.78	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002660

Deuteranopia (green-blind)

#00205D

Tritanopia (blue-blind)

#002A38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1b175e;
/* rgb */ color: rgb(27, 23, 94);
/* oklch */ color: oklch(26.6% 0.121 276.8);

Tailwind

colors: {
  custom: {
    50: '#62558c',
    500: '#1b175e',
    950: '#000000',
  },
}

SCSS

$custom: #1b175e;
$custom-light: #62558c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b175e",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 94
  },
  "hsl": {
    "h": 243.38,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.2661,
    "c": 0.12074,
    "h": 276.8
  },
  "luminance": 0.01654
}

Semantic roles & 50–950 ramp

primary

#1B175E

secondary

#90953C

accent

#E444DB

background

#F6F4F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1B175E

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

Preview Lab → · Contrast checker → · Palette generator →