#1B106E#1B106E

#1B106E is a dark, vivid blue. Relative luminance 0.017; OKLCH L 27.5% C 0.149 H 275.5°. Best body text is #FFFFFF at 15.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B106E
RGB	rgb(27, 16, 110)
HSL	hsl(247, 75%, 25%)
HSV	hsv(247, 85%, 43%)
CMYK	cmyk(75.5%, 85.5%, 0%, 56.9%)
CIE-LAB	lab(14.00, 36.27, -51.35)
CIE-LCH	lch(14.00, 62.87, 305.24°)
OKLab	oklab(27.47% 0.0143 -0.1484)
OKLCH	oklch(27.47% 0.149 275.5)
XYZ	xyz(3.4508, 1.7290, 14.9007)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B106E #636E10

analogous

#10346E #1B106E #4A106E

triadic

#1B106E #6E1B10 #106E1B

tetradic

#1B106E #6E1034 #636E10 #106E4A

square

#1B106E #6E1034 #636E10 #106E4A

split-complementary

#1B106E #6E4A10 #346E10

monochromatic

#07041B #0E0839 #1B106E #2818A3 #3520D9

Accessibility & contrast

On white

15.60

#1B106E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#1B106E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B106E

15.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B106E	#FFFFFF	#000000	##FFFFFF
##1B106E	1.00	15.60	1.35	15.60
#FFFFFF	15.60	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002871

Deuteranopia (green-blind)

#001F6C

Tritanopia (blue-blind)

#002E40

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #1b106e;
/* rgb */ color: rgb(27, 16, 110);
/* oklch */ color: oklch(27.5% 0.149 275.5);

Tailwind

colors: {
  custom: {
    50: '#675199',
    500: '#1b106e',
    950: '#000000',
  },
}

SCSS

$custom: #1b106e;
$custom-light: #675199;
$custom-dark: #000000;

JSON

{
  "hex": "#1b106e",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 110
  },
  "hsl": {
    "h": 247.021,
    "s": 74.603,
    "l": 24.706
  },
  "oklch": {
    "l": 0.27474,
    "c": 0.14912,
    "h": 275.5
  },
  "luminance": 0.01729
}

Semantic roles & 50–950 ramp

primary

#1B106E

secondary

#98A634

accent

#F137DB

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#07020E

muted

#7A787E

Preview Lab

Preview with #1B106E

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

Preview Lab → · Contrast checker → · Palette generator →