#1B1C85#1B1C85

#1B1C85 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.8% C 0.167 H 271.3°. Best body text is #FFFFFF at 13.54:1 contrast (WCAG AA passes).

Color values

HEX	#1B1C85
RGB	rgb(27, 28, 133)
HSL	hsl(239, 66%, 31%)
HSV	hsv(239, 80%, 52%)
CMYK	cmyk(79.7%, 78.9%, 0%, 47.8%)
CIE-LAB	lab(19.04, 37.54, -57.74)
CIE-LCH	lch(19.04, 68.87, 303.03°)
OKLab	oklab(31.81% 0.0039 -0.1672)
OKLCH	oklch(31.81% 0.167 271.3)
XYZ	xyz(5.0995, 2.7564, 22.4490)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1C85 #85841B

analogous

#1B5185 #1B1C85 #4F1B85

triadic

#1B1C85 #851B1C #1C851B

tetradic

#1B1C85 #851B51 #85841B #1B854F

square

#1B1C85 #851B51 #85841B #1B854F

split-complementary

#1B1C85 #854F1B #51851B

monochromatic

#06071F #111152 #1B1C85 #2527B8 #4243D9

Accessibility & contrast

On white

13.54

#1B1C85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B1C85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1C85

13.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1C85	#FFFFFF	#000000	##FFFFFF
##1B1C85	1.00	13.54	1.55	13.54
#FFFFFF	13.54	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003388

Deuteranopia (green-blind)

#002983

Tritanopia (blue-blind)

#003C50

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1c85;
/* rgb */ color: rgb(27, 28, 133);
/* oklch */ color: oklch(31.8% 0.167 271.3);

Tailwind

colors: {
  custom: {
    50: '#6c5aaa',
    500: '#1b1c85',
    950: '#000000',
  },
}

SCSS

$custom: #1b1c85;
$custom-light: #6c5aaa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1c85",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 133
  },
  "hsl": {
    "h": 239.434,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31814,
    "c": 0.16722,
    "h": 271.3
  },
  "luminance": 0.02757
}

Semantic roles & 50–950 ramp

primary

#1B1C85

secondary

#B8B744

accent

#E83FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1C85

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

Preview Lab → · Contrast checker → · Palette generator →