#1B158C#1B158C

#1B158C is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.182 H 271.4°. Best body text is #FFFFFF at 13.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B158C
RGB	rgb(27, 21, 140)
HSL	hsl(243, 74%, 32%)
HSV	hsv(243, 85%, 55%)
CMYK	cmyk(80.7%, 85%, 0%, 45.1%)
CIE-LAB	lab(18.64, 43.54, -62.80)
CIE-LCH	lch(18.64, 76.42, 304.73°)
OKLab	oklab(31.78% 0.0044 -0.1817)
OKLCH	oklch(31.78% 0.182 271.4)
XYZ	xyz(5.4522, 2.6622, 25.0324)
Luminance	0.0266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B158C #868C15

analogous

#154B8C #1B158C #57158C

triadic

#1B158C #8C1B15 #158C1B

tetradic

#1B158C #8C154B #868C15 #158C57

square

#1B158C #8C154B #868C15 #158C57

split-complementary

#1B158C #8C5715 #4B8C15

monochromatic

#060522 #110D57 #1B158C #251DC1 #423AE1

Accessibility & contrast

On white

13.70

#1B158C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B158C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B158C

13.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B158C	#FFFFFF	#000000	##FFFFFF
##1B158C	1.00	13.70	1.53	13.70
#FFFFFF	13.70	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338F

Deuteranopia (green-blind)

#00278A

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b158c;
/* rgb */ color: rgb(27, 21, 140);
/* oklch */ color: oklch(31.8% 0.182 271.4);

Tailwind

colors: {
  custom: {
    50: '#6e57af',
    500: '#1b158c',
    950: '#000000',
  },
}

SCSS

$custom: #1b158c;
$custom-light: #6e57af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b158c",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 140
  },
  "hsl": {
    "h": 243.025,
    "s": 73.913,
    "l": 31.569
  },
  "oklch": {
    "l": 0.3178,
    "c": 0.18178,
    "h": 271.4
  },
  "luminance": 0.02663
}

Semantic roles & 50–950 ramp

primary

#1B158C

secondary

#B9C03D

accent

#F137E7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B158C

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

Preview Lab → · Contrast checker → · Palette generator →