#1B0F58#1B0F58

#1B0F58 is a very dark, vivid blue. Relative luminance 0.013; OKLCH L 24.7% C 0.122 H 280.2°. Best body text is #FFFFFF at 16.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B0F58
RGB	rgb(27, 15, 88)
HSL	hsl(250, 71%, 20%)
HSV	hsv(250, 83%, 35%)
CMYK	cmyk(69.3%, 83%, 0%, 65.5%)
CIE-LAB	lab(11.13, 29.42, -41.47)
CIE-LCH	lch(11.13, 50.85, 305.36°)
OKLab	oklab(24.69% 0.0215 -0.1197)
OKLCH	oklch(24.69% 0.122 280.2)
XYZ	xyz(2.3837, 1.2791, 9.3519)
Luminance	0.0128 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B0F58 #4C580F

analogous

#0F2758 #1B0F58 #3F0F58

triadic

#1B0F58 #581B0F #0F581B

tetradic

#1B0F58 #580F27 #4C580F #0F583F

square

#1B0F58 #580F27 #4C580F #0F583F

split-complementary

#1B0F58 #583F0F #27580F

monochromatic

#08041A #0B0624 #1B0F58 #2B188C #3B21C1

Accessibility & contrast

On white

16.72

#1B0F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#1B0F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B0F58

16.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B0F58	#FFFFFF	#000000	##FFFFFF
##1B0F58	1.00	16.72	1.26	16.72
#FFFFFF	16.72	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205A

Deuteranopia (green-blind)

#001B57

Tritanopia (blue-blind)

#002433

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #1b0f58;
/* rgb */ color: rgb(27, 15, 88);
/* oklch */ color: oklch(24.7% 0.122 280.2);

Tailwind

colors: {
  custom: {
    50: '#614f88',
    500: '#1b0f58',
    950: '#000000',
  },
}

SCSS

$custom: #1b0f58;
$custom-light: #614f88;
$custom-dark: #000000;

JSON

{
  "hex": "#1b0f58",
  "rgb": {
    "r": 27,
    "g": 15,
    "b": 88
  },
  "hsl": {
    "h": 249.863,
    "s": 70.874,
    "l": 20.196
  },
  "oklch": {
    "l": 0.2469,
    "c": 0.12161,
    "h": 280.2
  },
  "luminance": 0.01279
}

Semantic roles & 50–950 ramp

primary

#1B0F58

secondary

#829231

accent

#EE3AD0

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020B

muted

#7A787C

Preview Lab

Preview with #1B0F58

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

Preview Lab → · Contrast checker → · Palette generator →