#1B138F#1B138F

#1B138F is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.9% C 0.187 H 271.3°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B138F
RGB	rgb(27, 19, 143)
HSL	hsl(244, 77%, 32%)
HSV	hsv(244, 87%, 56%)
CMYK	cmyk(81.1%, 86.7%, 0%, 43.9%)
CIE-LAB	lab(18.72, 45.38, -64.54)
CIE-LCH	lch(18.72, 78.90, 305.11°)
OKLab	oklab(31.95% 0.0041 -0.1867)
OKLCH	oklch(31.95% 0.187 271.3)
XYZ	xyz(5.6411, 2.6813, 26.2015)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B138F #878F13

analogous

#13498F #1B138F #59138F

triadic

#1B138F #8F1B13 #138F1B

tetradic

#1B138F #8F1349 #878F13 #138F59

square

#1B138F #8F1349 #878F13 #138F59

split-complementary

#1B138F #8F5913 #498F13

monochromatic

#070523 #110C59 #1B138F #251AC5 #4338E5

Accessibility & contrast

On white

13.67

#1B138F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B138F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B138F

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B138F	#FFFFFF	#000000	##FFFFFF
##1B138F	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003392

Deuteranopia (green-blind)

#00278D

Tritanopia (blue-blind)

#003C54

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b138f;
/* rgb */ color: rgb(27, 19, 143);
/* oklch */ color: oklch(31.9% 0.187 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f56b1',
    500: '#1b138f',
    950: '#000000',
  },
}

SCSS

$custom: #1b138f;
$custom-light: #6f56b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b138f",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 143
  },
  "hsl": {
    "h": 243.871,
    "s": 76.543,
    "l": 31.765
  },
  "oklch": {
    "l": 0.31948,
    "c": 0.18675,
    "h": 271.3
  },
  "luminance": 0.02682
}

Semantic roles & 50–950 ramp

primary

#1B138F

secondary

#BAC33B

accent

#F335E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B138F

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

Preview Lab → · Contrast checker → · Palette generator →