#1B2155#1B2155

#1B2155 is a dark, moderate blue. Relative luminance 0.020; OKLCH L 27.7% C 0.094 H 273.6°. Best body text is #FFFFFF at 15.05:1 contrast (WCAG AA passes).

Color values

HEX	#1B2155
RGB	rgb(27, 33, 85)
HSL	hsl(234, 52%, 22%)
HSV	hsv(234, 68%, 33%)
CMYK	cmyk(68.2%, 61.2%, 0%, 66.7%)
CIE-LAB	lab(15.36, 16.14, -32.51)
CIE-LCH	lch(15.36, 36.30, 296.40°)
OKLab	oklab(27.67% 0.0059 -0.0934)
OKLCH	oklch(27.67% 0.094 273.6)
XYZ	xyz(2.6350, 1.9764, 8.8352)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2155 #554F1B

analogous

#1B3E55 #1B2155 #321B55

triadic

#1B2155 #551B21 #21551B

tetradic

#1B2155 #551B3E #554F1B #1B5532

square

#1B2155 #551B3E #554F1B #1B5532

split-complementary

#1B2155 #55321B #3E551B

monochromatic

#070917 #0C0F27 #1B2155 #2A3383 #3945B2

Accessibility & contrast

On white

15.05

#1B2155 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1B2155 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2155

15.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2155	#FFFFFF	#000000	##FFFFFF
##1B2155	1.00	15.05	1.40	15.05
#FFFFFF	15.05	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002957

Deuteranopia (green-blind)

#002454

Tritanopia (blue-blind)

#002D37

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1b2155;
/* rgb */ color: rgb(27, 33, 85);
/* oklch */ color: oklch(27.7% 0.094 273.6);

Tailwind

colors: {
  custom: {
    50: '#5f5c85',
    500: '#1b2155',
    950: '#000000',
  },
}

SCSS

$custom: #1b2155;
$custom-light: #5f5c85;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2155",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 85
  },
  "hsl": {
    "h": 233.793,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.27668,
    "c": 0.09362,
    "h": 273.6
  },
  "luminance": 0.01977
}

Semantic roles & 50–950 ramp

primary

#1B2155

secondary

#8B8341

accent

#CC4DDB

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05040B

muted

#79797C

Preview Lab

Preview with #1B2155

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

Preview Lab → · Contrast checker → · Palette generator →