#1F198B#1F198B

#1F198B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.176 H 272.8°. Best body text is #FFFFFF at 13.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F198B
RGB	rgb(31, 25, 139)
HSL	hsl(243, 70%, 32%)
HSV	hsv(243, 82%, 55%)
CMYK	cmyk(77.7%, 82%, 0%, 45.5%)
CIE-LAB	lab(19.43, 41.50, -60.85)
CIE-LCH	lch(19.43, 73.65, 304.29°)
OKLab	oklab(32.36% 0.0086 -0.1761)
OKLCH	oklch(32.36% 0.176 272.8)
XYZ	xyz(5.5713, 2.8501, 24.6776)
Luminance	0.0285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F198B #858B19

analogous

#194C8B #1F198B #58198B

triadic

#1F198B #8B1F19 #198B1F

tetradic

#1F198B #8B194C #858B19 #198B58

square

#1F198B #8B194C #858B19 #198B58

split-complementary

#1F198B #8B5819 #4C8B19

monochromatic

#080623 #131057 #1F198B #2B22BF #4A41DD

Accessibility & contrast

On white

13.37

#1F198B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F198B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F198B

13.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F198B	#FFFFFF	#000000	##FFFFFF
##1F198B	1.00	13.37	1.57	13.37
#FFFFFF	13.37	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f198b;
/* rgb */ color: rgb(31, 25, 139);
/* oklch */ color: oklch(32.4% 0.176 272.8);

Tailwind

colors: {
  custom: {
    50: '#6f59ae',
    500: '#1f198b',
    950: '#000000',
  },
}

SCSS

$custom: #1f198b;
$custom-light: #6f59ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f198b",
  "rgb": {
    "r": 31,
    "g": 25,
    "b": 139
  },
  "hsl": {
    "h": 243.158,
    "s": 69.512,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32363,
    "c": 0.17627,
    "h": 272.8
  },
  "luminance": 0.02851
}

Semantic roles & 50–950 ramp

primary

#1F198B

secondary

#B7BE42

accent

#EC3BE3

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #1F198B

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

Preview Lab → · Contrast checker → · Palette generator →