#1B1978#1B1978

#1B1978 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.9% C 0.154 H 272.9°. Best body text is #FFFFFF at 14.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B1978
RGB	rgb(27, 25, 120)
HSL	hsl(241, 66%, 28%)
HSV	hsv(241, 79%, 47%)
CMYK	cmyk(77.5%, 79.2%, 0%, 52.9%)
CIE-LAB	lab(16.91, 34.75, -52.99)
CIE-LCH	lch(16.91, 63.37, 303.25°)
OKLab	oklab(29.87% 0.0078 -0.1533)
OKLCH	oklch(29.87% 0.154 272.9)
XYZ	xyz(4.1887, 2.2839, 17.9857)
Luminance	0.0228 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1978 #767819

analogous

#194678 #1B1978 #4A1978

triadic

#1B1978 #781B19 #19781B

tetradic

#1B1978 #781946 #767819 #19784A

square

#1B1978 #781946 #767819 #19784A

split-complementary

#1B1978 #784A19 #467819

monochromatic

#060519 #100E45 #1B1978 #2624AB #3A36D5

Accessibility & contrast

On white

14.42

#1B1978 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1B1978 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1978

14.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1978	#FFFFFF	#000000	##FFFFFF
##1B1978	1.00	14.42	1.46	14.42
#FFFFFF	14.42	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7B

Deuteranopia (green-blind)

#002576

Tritanopia (blue-blind)

#003547

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b1978;
/* rgb */ color: rgb(27, 25, 120);
/* oklch */ color: oklch(29.9% 0.154 272.9);

Tailwind

colors: {
  custom: {
    50: '#6957a0',
    500: '#1b1978',
    950: '#000000',
  },
}

SCSS

$custom: #1b1978;
$custom-light: #6957a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1978",
  "rgb": {
    "r": 27,
    "g": 25,
    "b": 120
  },
  "hsl": {
    "h": 241.263,
    "s": 65.517,
    "l": 28.431
  },
  "oklch": {
    "l": 0.29866,
    "c": 0.15355,
    "h": 272.9
  },
  "luminance": 0.02284
}

Semantic roles & 50–950 ramp

primary

#1B1978

secondary

#AAAD40

accent

#E83FE5

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1978

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

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