#1B106D#1B106D

#1B106D is a dark, vivid blue. Relative luminance 0.017; OKLCH L 27.4% C 0.148 H 275.7°. Best body text is #FFFFFF at 15.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B106D
RGB	rgb(27, 16, 109)
HSL	hsl(247, 74%, 25%)
HSV	hsv(247, 85%, 43%)
CMYK	cmyk(75.2%, 85.3%, 0%, 57.3%)
CIE-LAB	lab(13.87, 35.94, -50.90)
CIE-LCH	lch(13.87, 62.31, 305.23°)
OKLab	oklab(27.35% 0.0146 -0.1471)
OKLCH	oklch(27.35% 0.148 275.7)
XYZ	xyz(3.3967, 1.7074, 14.6156)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B106D #626D10

analogous

#10346D #1B106D #4A106D

triadic

#1B106D #6D1B10 #106D1B

tetradic

#1B106D #6D1034 #626D10 #106D4A

square

#1B106D #6D1034 #626D10 #106D4A

split-complementary

#1B106D #6D4A10 #346D10

monochromatic

#07041B #0E0838 #1B106D #2818A2 #3520D8

Accessibility & contrast

On white

15.65

#1B106D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#1B106D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B106D

15.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B106D	#FFFFFF	#000000	##FFFFFF
##1B106D	1.00	15.65	1.34	15.65
#FFFFFF	15.65	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002770

Deuteranopia (green-blind)

#001F6B

Tritanopia (blue-blind)

#002D3F

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1b106d;
/* rgb */ color: rgb(27, 16, 109);
/* oklch */ color: oklch(27.4% 0.148 275.7);

Tailwind

colors: {
  custom: {
    50: '#675198',
    500: '#1b106d',
    950: '#000000',
  },
}

SCSS

$custom: #1b106d;
$custom-light: #675198;
$custom-dark: #000000;

JSON

{
  "hex": "#1b106d",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 109
  },
  "hsl": {
    "h": 247.097,
    "s": 74.4,
    "l": 24.51
  },
  "oklch": {
    "l": 0.2735,
    "c": 0.14787,
    "h": 275.7
  },
  "luminance": 0.01708
}

Semantic roles & 50–950 ramp

primary

#1B106D

secondary

#98A534

accent

#F137DB

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#07020E

muted

#7A787E

Preview Lab

Preview with #1B106D

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

Preview Lab → · Contrast checker → · Palette generator →