#1B2F55#1B2F55

#1B2F55 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.0% C 0.073 H 262.1°. Best body text is #FFFFFF at 13.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F55
RGB	rgb(27, 47, 85)
HSL	hsl(219, 52%, 22%)
HSV	hsv(219, 68%, 33%)
CMYK	cmyk(68.2%, 44.7%, 0%, 66.7%)
CIE-LAB	lab(19.73, 5.89, -25.50)
CIE-LCH	lch(19.73, 26.17, 283.00°)
OKLab	oklab(30.99% -0.0101 -0.0726)
OKLCH	oklch(30.99% 0.073 262.1)
XYZ	xyz(3.1076, 2.9216, 8.9927)
Luminance	0.0292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F55 #55411B

analogous

#1B4C55 #1B2F55 #241B55

triadic

#1B2F55 #551B2F #2F551B

tetradic

#1B2F55 #551B4C #55411B #1B5524

square

#1B2F55 #551B4C #55411B #1B5524

split-complementary

#1B2F55 #55241B #4C551B

monochromatic

#070D17 #0C1527 #1B2F55 #2A4983 #3962B2

Accessibility & contrast

On white

13.25

#1B2F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B2F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F55

13.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F55	#FFFFFF	#000000	##FFFFFF
##1B2F55	1.00	13.25	1.58	13.25
#FFFFFF	13.25	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3356

Deuteranopia (green-blind)

#162D54

Tritanopia (blue-blind)

#00383D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2f55;
/* rgb */ color: rgb(27, 47, 85);
/* oklch */ color: oklch(31.0% 0.073 262.1);

Tailwind

colors: {
  custom: {
    50: '#5e6785',
    500: '#1b2f55',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f55;
$custom-light: #5e6785;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f55",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 85
  },
  "hsl": {
    "h": 219.31,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.30987,
    "c": 0.0733,
    "h": 262.1
  },
  "luminance": 0.02922
}

Semantic roles & 50–950 ramp

primary

#1B2F55

secondary

#8B7141

accent

#AA4DDB

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B2F55

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

Preview Lab → · Contrast checker → · Palette generator →