#1B1F97#1B1F97

#1B1F97 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.3% C 0.187 H 269.8°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F97
RGB	rgb(27, 31, 151)
HSL	hsl(238, 70%, 35%)
HSV	hsv(238, 82%, 59%)
CMYK	cmyk(82.1%, 79.5%, 0%, 40.8%)
CIE-LAB	lab(21.75, 42.02, -64.46)
CIE-LCH	lch(21.75, 76.95, 303.10°)
OKLab	oklab(34.34% -0.0006 -0.1867)
OKLCH	oklch(34.34% 0.187 269.8)
XYZ	xyz(6.5260, 3.4466, 29.5935)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F97 #97931B

analogous

#1B5D97 #1B1F97 #551B97

triadic

#1B1F97 #971B1F #1F971B

tetradic

#1B1F97 #971B5D #97931B #1B9755

square

#1B1F97 #971B5D #97931B #1B9755

split-complementary

#1B1F97 #97551B #5D971B

monochromatic

#080A2F #121463 #1B1F97 #242ACB #4D52DF

Accessibility & contrast

On white

12.43

#1B1F97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B1F97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F97

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F97	#FFFFFF	#000000	##FFFFFF
##1B1F97	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A9A

Deuteranopia (green-blind)

#002E95

Tritanopia (blue-blind)

#00445B

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b1f97;
/* rgb */ color: rgb(27, 31, 151);
/* oklch */ color: oklch(34.3% 0.187 269.8);

Tailwind

colors: {
  custom: {
    50: '#715db7',
    500: '#1b1f97',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f97;
$custom-light: #715db7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f97",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 151
  },
  "hsl": {
    "h": 238.065,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.34341,
    "c": 0.18672,
    "h": 269.8
  },
  "luminance": 0.03447
}

Semantic roles & 50–950 ramp

primary

#1B1F97

secondary

#C1BE4C

accent

#E73BEC

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1F97

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

Preview Lab → · Contrast checker → · Palette generator →