#1B175F#1B175F

#1B175F is a dark, vivid blue. Relative luminance 0.017; OKLCH L 26.7% C 0.122 H 276.7°. Best body text is #FFFFFF at 15.74:1 contrast (WCAG AA passes).

Color values

HEX	#1B175F
RGB	rgb(27, 23, 95)
HSL	hsl(243, 61%, 23%)
HSV	hsv(243, 76%, 37%)
CMYK	cmyk(71.6%, 75.8%, 0%, 62.7%)
CIE-LAB	lab(13.66, 27.00, -42.00)
CIE-LCH	lch(13.66, 49.93, 302.73°)
OKLab	oklab(26.72% 0.0142 -0.1213)
OKLCH	oklch(26.72% 0.122 276.7)
XYZ	xyz(2.8233, 1.6718, 10.9982)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B175F #5B5F17

analogous

#17375F #1B175F #3F175F

triadic

#1B175F #5F1B17 #175F1B

tetradic

#1B175F #5F1737 #5B5F17 #175F3F

square

#1B175F #5F1737 #5B5F17 #175F3F

split-complementary

#1B175F #5F3F17 #375F17

monochromatic

#070619 #0D0B2E #1B175F #292390 #372FC2

Accessibility & contrast

On white

15.74

#1B175F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1B175F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B175F

15.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B175F	#FFFFFF	#000000	##FFFFFF
##1B175F	1.00	15.74	1.33	15.74
#FFFFFF	15.74	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002661

Deuteranopia (green-blind)

#00205E

Tritanopia (blue-blind)

#002B39

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1b175f;
/* rgb */ color: rgb(27, 23, 95);
/* oklch */ color: oklch(26.7% 0.122 276.7);

Tailwind

colors: {
  custom: {
    50: '#62558d',
    500: '#1b175f',
    950: '#000000',
  },
}

SCSS

$custom: #1b175f;
$custom-light: #62558d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b175f",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 95
  },
  "hsl": {
    "h": 243.333,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.26719,
    "c": 0.12214,
    "h": 276.7
  },
  "luminance": 0.01672
}

Semantic roles & 50–950 ramp

primary

#1B175F

secondary

#91963C

accent

#E444DB

background

#F6F4F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1B175F

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

Preview Lab → · Contrast checker → · Palette generator →