#1B1171#1B1171

#1B1171 is a dark, vivid blue. Relative luminance 0.018; OKLCH L 28.0% C 0.152 H 274.9°. Best body text is #FFFFFF at 15.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B1171
RGB	rgb(27, 17, 113)
HSL	hsl(246, 74%, 25%)
HSV	hsv(246, 85%, 44%)
CMYK	cmyk(76.1%, 85%, 0%, 55.7%)
CIE-LAB	lab(14.55, 36.75, -52.39)
CIE-LCH	lch(14.55, 64.00, 305.05°)
OKLab	oklab(27.96% 0.013 -0.1515)
OKLCH	oklch(27.96% 0.152 274.9)
XYZ	xyz(3.6321, 1.8258, 15.7806)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1171 #677111

analogous

#113771 #1B1171 #4B1171

triadic

#1B1171 #711B11 #11711B

tetradic

#1B1171 #711137 #677111 #11714B

square

#1B1171 #711137 #677111 #11714B

split-complementary

#1B1171 #714B11 #377111

monochromatic

#06041B #0E093C #1B1171 #2819A6 #3421DB

Accessibility & contrast

On white

15.38

#1B1171 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B1171 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1171

15.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1171	#FFFFFF	#000000	##FFFFFF
##1B1171	1.00	15.38	1.37	15.38
#FFFFFF	15.38	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002974

Deuteranopia (green-blind)

#00206F

Tritanopia (blue-blind)

#002F42

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b1171;
/* rgb */ color: rgb(27, 17, 113);
/* oklch */ color: oklch(28.0% 0.152 274.9);

Tailwind

colors: {
  custom: {
    50: '#68529b',
    500: '#1b1171',
    950: '#000000',
  },
}

SCSS

$custom: #1b1171;
$custom-light: #68529b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1171",
  "rgb": {
    "r": 27,
    "g": 17,
    "b": 113
  },
  "hsl": {
    "h": 246.25,
    "s": 73.846,
    "l": 25.49
  },
  "oklch": {
    "l": 0.27964,
    "c": 0.15205,
    "h": 274.9
  },
  "luminance": 0.01826
}

Semantic roles & 50–950 ramp

primary

#1B1171

secondary

#9CA836

accent

#F137DD

background

#F6F4F9

surface

#ECE7F2

border

#C7C3CC

text

#07020E

muted

#7A787E

Preview Lab

Preview with #1B1171

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

Preview Lab → · Contrast checker → · Palette generator →