#191B58#191B58

#191B58 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.107 H 274.9°. Best body text is #FFFFFF at 15.68:1 contrast (WCAG AA passes).

Color values

HEX	#191B58
RGB	rgb(25, 27, 88)
HSL	hsl(238, 56%, 22%)
HSV	hsv(238, 72%, 35%)
CMYK	cmyk(71.6%, 69.3%, 0%, 65.5%)
CIE-LAB	lab(13.80, 21.32, -37.09)
CIE-LCH	lch(13.80, 42.78, 299.89°)
OKLab	oklab(26.56% 0.0091 -0.107)
OKLCH	oklch(26.56% 0.107 274.9)
XYZ	xyz(2.5537, 1.6949, 9.4232)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#191B58 #585619

analogous

#193B58 #191B58 #371958

triadic

#191B58 #58191B #1B5819

tetradic

#191B58 #58193B #585619 #195837

square

#191B58 #58193B #585619 #195837

split-complementary

#191B58 #583719 #3B5819

monochromatic

#070718 #0B0C28 #191B58 #272A88 #3438B7

Accessibility & contrast

On white

15.68

#191B58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#191B58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #191B58

15.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##191B58	#FFFFFF	#000000	##FFFFFF
##191B58	1.00	15.68	1.34	15.68
#FFFFFF	15.68	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265A

Deuteranopia (green-blind)

#002057

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #191b58;
/* rgb */ color: rgb(25, 27, 88);
/* oklch */ color: oklch(26.6% 0.107 274.9);

Tailwind

colors: {
  custom: {
    50: '#5f5788',
    500: '#191b58',
    950: '#000000',
  },
}

SCSS

$custom: #191b58;
$custom-light: #5f5788;
$custom-dark: #000000;

JSON

{
  "hex": "#191b58",
  "rgb": {
    "r": 25,
    "g": 27,
    "b": 88
  },
  "hsl": {
    "h": 238.095,
    "s": 55.752,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26558,
    "c": 0.10739,
    "h": 274.9
  },
  "luminance": 0.01695
}

Semantic roles & 50–950 ramp

primary

#191B58

secondary

#8E8C3E

accent

#DA49DF

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #191B58

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

Preview Lab → · Contrast checker → · Palette generator →