#1B154B#1B154B

#1B154B is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.3% C 0.096 H 281.6°. Best body text is #FFFFFF at 16.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B154B
RGB	rgb(27, 21, 75)
HSL	hsl(247, 56%, 19%)
HSV	hsv(247, 72%, 29%)
CMYK	cmyk(64%, 72%, 0%, 70.6%)
CIE-LAB	lab(11.12, 20.93, -32.59)
CIE-LCH	lch(11.12, 38.73, 302.71°)
OKLab	oklab(24.26% 0.0192 -0.0937)
OKLCH	oklch(24.26% 0.096 281.6)
XYZ	xyz(1.9898, 1.2772, 6.7969)
Luminance	0.0128 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B154B #454B15

analogous

#152A4B #1B154B #36154B

triadic

#1B154B #4B1B15 #154B1B

tetradic

#1B154B #4B152A #454B15 #154B36

square

#1B154B #4B152A #454B15 #154B36

split-complementary

#1B154B #4B3615 #2A4B15

monochromatic

#090718 #0A081B #1B154B #2C227B #3D30AB

Accessibility & contrast

On white

16.73

#1B154B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#1B154B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B154B

16.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B154B	#FFFFFF	#000000	##FFFFFF
##1B154B	1.00	16.73	1.26	16.73
#FFFFFF	16.73	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00204D

Deuteranopia (green-blind)

#001C4A

Tritanopia (blue-blind)

#02232D

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #1b154b;
/* rgb */ color: rgb(27, 21, 75);
/* oklch */ color: oklch(24.3% 0.096 281.6);

Tailwind

colors: {
  custom: {
    50: '#5e527e',
    500: '#1b154b',
    950: '#000000',
  },
}

SCSS

$custom: #1b154b;
$custom-light: #5e527e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b154b",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 75
  },
  "hsl": {
    "h": 246.667,
    "s": 56.25,
    "l": 18.824
  },
  "oklch": {
    "l": 0.24257,
    "c": 0.09569,
    "h": 281.6
  },
  "luminance": 0.01277
}

Semantic roles & 50–950 ramp

primary

#1B154B

secondary

#7B8339

accent

#E048CF

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #1B154B

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

Preview Lab → · Contrast checker → · Palette generator →