#1B285B#1B285B

#1B285B is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.8% C 0.093 H 269.3°. Best body text is #FFFFFF at 13.99:1 contrast (WCAG AA passes).

Color values

HEX	#1B285B
RGB	rgb(27, 40, 91)
HSL	hsl(228, 54%, 23%)
HSV	hsv(228, 70%, 36%)
CMYK	cmyk(70.3%, 56%, 0%, 64.3%)
CIE-LAB	lab(17.94, 13.42, -32.36)
CIE-LCH	lch(17.94, 35.03, 292.52°)
OKLab	oklab(29.76% -0.0011 -0.0929)
OKLCH	oklch(29.76% 0.093 269.3)
XYZ	xyz(3.0985, 2.5056, 10.2159)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B285B #5B4E1B

analogous

#1B485B #1B285B #2E1B5B

triadic

#1B285B #5B1B28 #285B1B

tetradic

#1B285B #5B1B48 #5B4E1B #1B5B2E

square

#1B285B #5B1B48 #5B4E1B #1B5B2E

split-complementary

#1B285B #5B2E1B #485B1B

monochromatic

#070A18 #0D132C #1B285B #293D8A #3751B9

Accessibility & contrast

On white

13.99

#1B285B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1B285B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B285B

13.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B285B	#FFFFFF	#000000	##FFFFFF
##1B285B	1.00	13.99	1.50	13.99
#FFFFFF	13.99	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#082F5D

Deuteranopia (green-blind)

#00295A

Tritanopia (blue-blind)

#00343D

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b285b;
/* rgb */ color: rgb(27, 40, 91);
/* oklch */ color: oklch(29.8% 0.093 269.3);

Tailwind

colors: {
  custom: {
    50: '#60618a',
    500: '#1b285b',
    950: '#000000',
  },
}

SCSS

$custom: #1b285b;
$custom-light: #60618a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b285b",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 91
  },
  "hsl": {
    "h": 227.813,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.29761,
    "c": 0.09288,
    "h": 269.3
  },
  "luminance": 0.02506
}

Semantic roles & 50–950 ramp

primary

#1B285B

secondary

#918141

accent

#C04ADE

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #1B285B

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

Preview Lab → · Contrast checker → · Palette generator →