#1C105B#1C105B

#1C105B is a dark, vivid blue. Relative luminance 0.014; OKLCH L 25.3% C 0.124 H 280.0°. Best body text is #FFFFFF at 16.48:1 contrast (WCAG AA passes).

Color values

HEX	#1C105B
RGB	rgb(28, 16, 91)
HSL	hsl(250, 70%, 21%)
HSV	hsv(250, 82%, 36%)
CMYK	cmyk(69.2%, 82.4%, 0%, 64.3%)
CIE-LAB	lab(11.77, 30.00, -42.43)
CIE-LCH	lch(11.77, 51.96, 305.27°)
OKLab	oklab(25.27% 0.0216 -0.1225)
OKLCH	oklch(25.27% 0.124 280)
XYZ	xyz(2.5519, 1.3726, 10.0260)
Luminance	0.0137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C105B #4F5B10

analogous

#10295B #1C105B #41105B

triadic

#1C105B #5B1C10 #105B1C

tetradic

#1C105B #5B1029 #4F5B10 #105B41

square

#1C105B #5B1029 #4F5B10 #105B41

split-complementary

#1C105B #5B4110 #295B10

monochromatic

#08051A #0C0727 #1C105B #2C198F #3C22C3

Accessibility & contrast

On white

16.48

#1C105B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#1C105B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C105B

16.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C105B	#FFFFFF	#000000	##FFFFFF
##1C105B	1.00	16.48	1.27	16.48
#FFFFFF	16.48	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00225D

Deuteranopia (green-blind)

#001C5A

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #1c105b;
/* rgb */ color: rgb(28, 16, 91);
/* oklch */ color: oklch(25.3% 0.124 280.0);

Tailwind

colors: {
  custom: {
    50: '#63508a',
    500: '#1c105b',
    950: '#000000',
  },
}

SCSS

$custom: #1c105b;
$custom-light: #63508a;
$custom-dark: #000000;

JSON

{
  "hex": "#1c105b",
  "rgb": {
    "r": 28,
    "g": 16,
    "b": 91
  },
  "hsl": {
    "h": 249.6,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.2527,
    "c": 0.12435,
    "h": 280
  },
  "luminance": 0.01373
}

Semantic roles & 50–950 ramp

primary

#1C105B

secondary

#859433

accent

#ED3BD0

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1C105B

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

Preview Lab → · Contrast checker → · Palette generator →