#1B0F5A#1B0F5A

#1B0F5A is a very dark, vivid blue. Relative luminance 0.013; OKLCH L 24.9% C 0.124 H 279.7°. Best body text is #FFFFFF at 16.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B0F5A
RGB	rgb(27, 15, 90)
HSL	hsl(250, 71%, 21%)
HSV	hsv(250, 83%, 35%)
CMYK	cmyk(70%, 83.3%, 0%, 64.7%)
CIE-LAB	lab(11.36, 30.11, -42.43)
CIE-LCH	lch(11.36, 52.03, 305.36°)
OKLab	oklab(24.92% 0.0209 -0.1225)
OKLCH	oklch(24.92% 0.124 279.7)
XYZ	xyz(2.4677, 1.3126, 9.7942)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0F5A #4E5A0F

analogous

#0F285A #1B0F5A #400F5A

triadic

#1B0F5A #5A1B0F #0F5A1B

tetradic

#1B0F5A #5A0F28 #4E5A0F #0F5A40

square

#1B0F5A #5A0F28 #4E5A0F #0F5A40

split-complementary

#1B0F5A #5A400F #285A0F

monochromatic

#08041A #0B0626 #1B0F5A #2B188E #3A20C3

Accessibility & contrast

On white

16.63

#1B0F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#1B0F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0F5A

16.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0F5A	#FFFFFF	#000000	##FFFFFF
##1B0F5A	1.00	16.63	1.26	16.63
#FFFFFF	16.63	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215C

Deuteranopia (green-blind)

#001B59

Tritanopia (blue-blind)

#002534

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #1b0f5a;
/* rgb */ color: rgb(27, 15, 90);
/* oklch */ color: oklch(24.9% 0.124 279.7);

Tailwind

colors: {
  custom: {
    50: '#624f8a',
    500: '#1b0f5a',
    950: '#000000',
  },
}

SCSS

$custom: #1b0f5a;
$custom-light: #624f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0f5a",
  "rgb": {
    "r": 27,
    "g": 15,
    "b": 90
  },
  "hsl": {
    "h": 249.6,
    "s": 71.429,
    "l": 20.588
  },
  "oklch": {
    "l": 0.24924,
    "c": 0.12428,
    "h": 279.7
  },
  "luminance": 0.01313
}

Semantic roles & 50–950 ramp

primary

#1B0F5A

secondary

#849431

accent

#EE3AD1

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B0F5A

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

Preview Lab → · Contrast checker → · Palette generator →