#1B2153#1B2153

#1B2153 is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.5% C 0.090 H 273.7°. Best body text is #FFFFFF at 15.12:1 contrast (WCAG AA passes).

Color values

HEX	#1B2153
RGB	rgb(27, 33, 83)
HSL	hsl(234, 51%, 22%)
HSV	hsv(234, 67%, 33%)
CMYK	cmyk(67.5%, 60.2%, 0%, 67.5%)
CIE-LAB	lab(15.20, 15.35, -31.43)
CIE-LCH	lch(15.20, 34.98, 296.03°)
OKLab	oklab(27.49% 0.0059 -0.0902)
OKLCH	oklch(27.49% 0.09 273.7)
XYZ	xyz(2.5567, 1.9450, 8.4226)
Luminance	0.0194 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2153 #534D1B

analogous

#1B3D53 #1B2153 #311B53

triadic

#1B2153 #531B21 #21531B

tetradic

#1B2153 #531B3D #534D1B #1B5331

square

#1B2153 #531B3D #534D1B #1B5331

split-complementary

#1B2153 #53311B #3D531B

monochromatic

#080917 #0C0F25 #1B2153 #2A3381 #3946AF

Accessibility & contrast

On white

15.12

#1B2153 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1B2153 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2153

15.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2153	#FFFFFF	#000000	##FFFFFF
##1B2153	1.00	15.12	1.39	15.12
#FFFFFF	15.12	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002955

Deuteranopia (green-blind)

#002452

Tritanopia (blue-blind)

#002D36

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1b2153;
/* rgb */ color: rgb(27, 33, 83);
/* oklch */ color: oklch(27.5% 0.090 273.7);

Tailwind

colors: {
  custom: {
    50: '#5e5c84',
    500: '#1b2153',
    950: '#000000',
  },
}

SCSS

$custom: #1b2153;
$custom-light: #5e5c84;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2153",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 83
  },
  "hsl": {
    "h": 233.571,
    "s": 50.909,
    "l": 21.569
  },
  "oklch": {
    "l": 0.27491,
    "c": 0.09043,
    "h": 273.7
  },
  "luminance": 0.01945
}

Semantic roles & 50–950 ramp

primary

#1B2153

secondary

#898141

accent

#CB4DDA

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05040B

muted

#79797C

Preview Lab

Preview with #1B2153

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

Preview Lab → · Contrast checker → · Palette generator →