#1B3565#1B3565

#1B3565 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.6% C 0.090 H 261.5°. Best body text is #FFFFFF at 12.04:1 contrast (WCAG AA passes).

Color values

HEX	#1B3565
RGB	rgb(27, 53, 101)
HSL	hsl(219, 58%, 25%)
HSV	hsv(219, 73%, 40%)
CMYK	cmyk(73.3%, 47.5%, 0%, 60.4%)
CIE-LAB	lab(22.72, 8.09, -31.25)
CIE-LCH	lch(22.72, 32.28, 284.51°)
OKLab	oklab(33.64% -0.0134 -0.0894)
OKLCH	oklch(33.64% 0.09 261.5)
XYZ	xyz(4.0732, 3.7184, 12.8125)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3565 #654B1B

analogous

#1B5A65 #1B3565 #261B65

triadic

#1B3565 #651B35 #35651B

tetradic

#1B3565 #651B5A #654B1B #1B6526

square

#1B3565 #651B5A #654B1B #1B6526

split-complementary

#1B3565 #65261B #5A651B

monochromatic

#060D18 #0E1C35 #1B3565 #284E95 #3568C6

Accessibility & contrast

On white

12.04

#1B3565 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1B3565 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3565

12.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3565	#FFFFFF	#000000	##FFFFFF
##1B3565	1.00	12.04	1.74	12.04
#FFFFFF	12.04	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D3A67

Deuteranopia (green-blind)

#103364

Tritanopia (blue-blind)

#004048

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b3565;
/* rgb */ color: rgb(27, 53, 101);
/* oklch */ color: oklch(33.6% 0.090 261.5);

Tailwind

colors: {
  custom: {
    50: '#616b91',
    500: '#1b3565',
    950: '#000000',
  },
}

SCSS

$custom: #1b3565;
$custom-light: #616b91;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3565",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 101
  },
  "hsl": {
    "h": 218.919,
    "s": 57.813,
    "l": 25.098
  },
  "oklch": {
    "l": 0.33638,
    "c": 0.09039,
    "h": 261.5
  },
  "luminance": 0.03719
}

Semantic roles & 50–950 ramp

primary

#1B3565

secondary

#9A7B41

accent

#AB47E1

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05060D

muted

#7A7A7D

Preview Lab

Preview with #1B3565

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

Preview Lab → · Contrast checker → · Palette generator →