#1F1B8B#1F1B8B

#1F1B8B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.175 H 272.6°. Best body text is #FFFFFF at 13.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F1B8B
RGB	rgb(31, 27, 139)
HSL	hsl(242, 67%, 33%)
HSV	hsv(242, 81%, 55%)
CMYK	cmyk(77.7%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(19.80, 40.44, -60.25)
CIE-LCH	lch(19.80, 72.56, 303.87°)
OKLab	oklab(32.62% 0.0079 -0.1743)
OKLCH	oklch(32.62% 0.175 272.6)
XYZ	xyz(5.6156, 2.9387, 24.6923)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1B8B #878B1B

analogous

#1B4F8B #1F1B8B #571B8B

triadic

#1F1B8B #8B1F1B #1B8B1F

tetradic

#1F1B8B #8B1B4F #878B1B #1B8B57

square

#1F1B8B #8B1B4F #878B1B #1B8B57

split-complementary

#1F1B8B #8B571B #4F8B1B

monochromatic

#080725 #141158 #1F1B8B #2A25BE #4B45DB

Accessibility & contrast

On white

13.23

#1F1B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1F1B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1B8B

13.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1B8B	#FFFFFF	#000000	##FFFFFF
##1F1B8B	1.00	13.23	1.59	13.23
#FFFFFF	13.23	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002A89

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f1b8b;
/* rgb */ color: rgb(31, 27, 139);
/* oklch */ color: oklch(32.6% 0.175 272.6);

Tailwind

colors: {
  custom: {
    50: '#6f5aae',
    500: '#1f1b8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f1b8b;
$custom-light: #6f5aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1b8b",
  "rgb": {
    "r": 31,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 242.143,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32617,
    "c": 0.17453,
    "h": 272.6
  },
  "luminance": 0.02939
}

Semantic roles & 50–950 ramp

primary

#1F1B8B

secondary

#B8BC45

accent

#EA3DE4

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #1F1B8B

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

Preview Lab → · Contrast checker → · Palette generator →