#1B105F#1B105F

#1B105F is a dark, vivid blue. Relative luminance 0.014; OKLCH L 25.7% C 0.130 H 278.3°. Best body text is #FFFFFF at 16.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B105F
RGB	rgb(27, 16, 95)
HSL	hsl(248, 71%, 22%)
HSV	hsv(248, 83%, 37%)
CMYK	cmyk(71.6%, 83.2%, 0%, 62.7%)
CIE-LAB	lab(12.15, 31.25, -44.49)
CIE-LCH	lch(12.15, 54.37, 305.09°)
OKLab	oklab(25.65% 0.0188 -0.1285)
OKLCH	oklch(25.65% 0.13 278.3)
XYZ	xyz(2.7022, 1.4296, 10.9578)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B105F #545F10

analogous

#102D5F #1B105F #43105F

triadic

#1B105F #5F1B10 #105F1B

tetradic

#1B105F #5F102D #545F10 #105F43

square

#1B105F #5F102D #545F10 #105F43

split-complementary

#1B105F #5F4310 #2D5F10

monochromatic

#07041A #0C072B #1B105F #2A1993 #3922C8

Accessibility & contrast

On white

16.33

#1B105F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#1B105F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B105F

16.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B105F	#FFFFFF	#000000	##FFFFFF
##1B105F	1.00	16.33	1.29	16.33
#FFFFFF	16.33	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002361

Deuteranopia (green-blind)

#001D5E

Tritanopia (blue-blind)

#002837

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #1b105f;
/* rgb */ color: rgb(27, 16, 95);
/* oklch */ color: oklch(25.7% 0.130 278.3);

Tailwind

colors: {
  custom: {
    50: '#63508d',
    500: '#1b105f',
    950: '#000000',
  },
}

SCSS

$custom: #1b105f;
$custom-light: #63508d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b105f",
  "rgb": {
    "r": 27,
    "g": 16,
    "b": 95
  },
  "hsl": {
    "h": 248.354,
    "s": 71.171,
    "l": 21.765
  },
  "oklch": {
    "l": 0.25653,
    "c": 0.12987,
    "h": 278.3
  },
  "luminance": 0.0143
}

Semantic roles & 50–950 ramp

primary

#1B105F

secondary

#8A9833

accent

#EE3AD5

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B105F

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

Preview Lab → · Contrast checker → · Palette generator →