#1B138E#1B138E

#1B138E is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.186 H 271.3°. Best body text is #FFFFFF at 13.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B138E
RGB	rgb(27, 19, 142)
HSL	hsl(244, 76%, 32%)
HSV	hsv(244, 87%, 56%)
CMYK	cmyk(81%, 86.6%, 0%, 44.3%)
CIE-LAB	lab(18.59, 45.07, -64.13)
CIE-LCH	lch(18.59, 78.39, 305.10°)
OKLab	oklab(31.82% 0.0043 -0.1855)
OKLCH	oklch(31.82% 0.186 271.3)
XYZ	xyz(5.5657, 2.6511, 25.8043)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B138E #868E13

analogous

#13498E #1B138E #59138E

triadic

#1B138E #8E1B13 #138E1B

tetradic

#1B138E #8E1349 #868E13 #138E59

square

#1B138E #8E1349 #868E13 #138E59

split-complementary

#1B138E #8E5913 #498E13

monochromatic

#060522 #110C58 #1B138E #251AC4 #4237E4

Accessibility & contrast

On white

13.72

#1B138E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B138E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B138E

13.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B138E	#FFFFFF	#000000	##FFFFFF
##1B138E	1.00	13.72	1.53	13.72
#FFFFFF	13.72	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003391

Deuteranopia (green-blind)

#00278C

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b138e;
/* rgb */ color: rgb(27, 19, 142);
/* oklch */ color: oklch(31.8% 0.186 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f56b0',
    500: '#1b138e',
    950: '#000000',
  },
}

SCSS

$custom: #1b138e;
$custom-light: #6f56b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b138e",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 142
  },
  "hsl": {
    "h": 243.902,
    "s": 76.398,
    "l": 31.569
  },
  "oklch": {
    "l": 0.31821,
    "c": 0.18558,
    "h": 271.3
  },
  "luminance": 0.02652
}

Semantic roles & 50–950 ramp

primary

#1B138E

secondary

#B9C23B

accent

#F335E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B138E

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

Preview Lab → · Contrast checker → · Palette generator →