#1B1F85#1B1F85

#1B1F85 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.3% C 0.164 H 270.9°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F85
RGB	rgb(27, 31, 133)
HSL	hsl(238, 66%, 31%)
HSV	hsv(238, 80%, 52%)
CMYK	cmyk(79.7%, 76.7%, 0%, 47.8%)
CIE-LAB	lab(19.66, 35.78, -56.71)
CIE-LCH	lch(19.66, 67.05, 302.25°)
OKLab	oklab(32.25% 0.0027 -0.1642)
OKLCH	oklch(32.25% 0.164 270.9)
XYZ	xyz(5.1742, 2.9059, 22.4739)
Luminance	0.0291 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F85 #85811B

analogous

#1B5485 #1B1F85 #4C1B85

triadic

#1B1F85 #851B1F #1F851B

tetradic

#1B1F85 #851B54 #85811B #1B854C

square

#1B1F85 #851B54 #85811B #1B854C

split-complementary

#1B1F85 #854C1B #54851B

monochromatic

#06071F #111352 #1B1F85 #252BB8 #4247D9

Accessibility & contrast

On white

13.28

#1B1F85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B1F85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F85

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F85	#FFFFFF	#000000	##FFFFFF
##1B1F85	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003588

Deuteranopia (green-blind)

#002A83

Tritanopia (blue-blind)

#003D50

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1f85;
/* rgb */ color: rgb(27, 31, 133);
/* oklch */ color: oklch(32.3% 0.164 270.9);

Tailwind

colors: {
  custom: {
    50: '#6c5caa',
    500: '#1b1f85',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f85;
$custom-light: #6c5caa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f85",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 133
  },
  "hsl": {
    "h": 237.736,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.32254,
    "c": 0.16423,
    "h": 270.9
  },
  "luminance": 0.02906
}

Semantic roles & 50–950 ramp

primary

#1B1F85

secondary

#B8B444

accent

#E33FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1F85

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

Preview Lab → · Contrast checker → · Palette generator →