#191B3F#191B3F

#191B3F is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.3% C 0.067 H 277.7°. Best body text is #FFFFFF at 16.54:1 contrast (WCAG AA passes).

Color values

HEX	#191B3F
RGB	rgb(25, 27, 63)
HSL	hsl(237, 43%, 17%)
HSV	hsv(237, 60%, 25%)
CMYK	cmyk(60.3%, 57.1%, 0%, 75.3%)
CIE-LAB	lab(11.62, 11.46, -23.39)
CIE-LCH	lch(11.62, 26.05, 296.10°)
OKLab	oklab(24.25% 0.0091 -0.0667)
OKLCH	oklch(24.25% 0.067 277.7)
XYZ	xyz(1.6898, 1.3493, 4.8731)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#191B3F #3F3D19

analogous

#192E3F #191B3F #2A193F

triadic

#191B3F #3F191B #1B3F19

tetradic

#191B3F #3F192E #3F3D19 #193F2A

square

#191B3F #3F192E #3F3D19 #193F2A

split-complementary

#191B3F #3F2A19 #2E3F19

monochromatic

#090916 #090916 #191B3F #2A2E6B #3C4197

Accessibility & contrast

On white

16.54

#191B3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#191B3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #191B3F

16.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##191B3F	#FFFFFF	#000000	##FFFFFF
##191B3F	1.00	16.54	1.27	16.54
#FFFFFF	16.54	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#092040

Deuteranopia (green-blind)

#061D3E

Tritanopia (blue-blind)

#08232A

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #191b3f;
/* rgb */ color: rgb(25, 27, 63);
/* oklch */ color: oklch(24.3% 0.067 277.7);

Tailwind

colors: {
  custom: {
    50: '#595774',
    500: '#191b3f',
    950: '#000000',
  },
}

SCSS

$custom: #191b3f;
$custom-light: #595774;
$custom-dark: #000000;

JSON

{
  "hex": "#191b3f",
  "rgb": {
    "r": 25,
    "g": 27,
    "b": 63
  },
  "hsl": {
    "h": 236.842,
    "s": 43.182,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24254,
    "c": 0.06734,
    "h": 277.7
  },
  "luminance": 0.01349
}

Semantic roles & 50–950 ramp

primary

#191B3F

secondary

#75723F

accent

#CC55D3

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #191B3F

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

Preview Lab → · Contrast checker → · Palette generator →