#1B138C#1B138C

#1B138C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.6% C 0.183 H 271.5°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B138C
RGB	rgb(27, 19, 140)
HSL	hsl(244, 76%, 31%)
HSV	hsv(244, 86%, 55%)
CMYK	cmyk(80.7%, 86.4%, 0%, 45.1%)
CIE-LAB	lab(18.33, 44.45, -63.32)
CIE-LCH	lch(18.33, 77.36, 305.07°)
OKLab	oklab(31.57% 0.0049 -0.1832)
OKLCH	oklch(31.57% 0.183 271.5)
XYZ	xyz(5.4169, 2.5916, 25.0206)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B138C #848C13

analogous

#13478C #1B138C #57138C

triadic

#1B138C #8C1B13 #138C1B

tetradic

#1B138C #8C1347 #848C13 #138C57

square

#1B138C #8C1347 #848C13 #138C57

split-complementary

#1B138C #8C5713 #478C13

monochromatic

#060420 #110C56 #1B138C #251AC2 #4136E4

Accessibility & contrast

On white

13.83

#1B138C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B138C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B138C

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B138C	#FFFFFF	#000000	##FFFFFF
##1B138C	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328F

Deuteranopia (green-blind)

#00278A

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b138c;
/* rgb */ color: rgb(27, 19, 140);
/* oklch */ color: oklch(31.6% 0.183 271.5);

Tailwind

colors: {
  custom: {
    50: '#6f56af',
    500: '#1b138c',
    950: '#000000',
  },
}

SCSS

$custom: #1b138c;
$custom-light: #6f56af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b138c",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 140
  },
  "hsl": {
    "h": 243.967,
    "s": 76.101,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31568,
    "c": 0.18323,
    "h": 271.5
  },
  "luminance": 0.02592
}

Semantic roles & 50–950 ramp

primary

#1B138C

secondary

#B7C03B

accent

#F335E6

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B138C

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

Preview Lab → · Contrast checker → · Palette generator →