#1B285F#1B285F

#1B285F is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.1% C 0.099 H 269.5°. Best body text is #FFFFFF at 13.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B285F
RGB	rgb(27, 40, 95)
HSL	hsl(229, 56%, 24%)
HSV	hsv(229, 72%, 37%)
CMYK	cmyk(71.6%, 57.9%, 0%, 62.7%)
CIE-LAB	lab(18.26, 15.04, -34.50)
CIE-LCH	lch(18.26, 37.63, 293.55°)
OKLab	oklab(30.1% -0.0008 -0.0992)
OKLCH	oklch(30.1% 0.099 269.5)
XYZ	xyz(3.2756, 2.5765, 11.1489)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B285F #5F521B

analogous

#1B4A5F #1B285F #301B5F

triadic

#1B285F #5F1B28 #285F1B

tetradic

#1B285F #5F1B4A #5F521B #1B5F30

square

#1B285F #5F1B4A #5F521B #1B5F30

split-complementary

#1B285F #5F301B #4A5F1B

monochromatic

#070A18 #0D142F #1B285F #293C8F #3650BE

Accessibility & contrast

On white

13.86

#1B285F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B285F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B285F

13.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B285F	#FFFFFF	#000000	##FFFFFF
##1B285F	1.00	13.86	1.52	13.86
#FFFFFF	13.86	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#023061

Deuteranopia (green-blind)

#002A5E

Tritanopia (blue-blind)

#00353F

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b285f;
/* rgb */ color: rgb(27, 40, 95);
/* oklch */ color: oklch(30.1% 0.099 269.5);

Tailwind

colors: {
  custom: {
    50: '#61618d',
    500: '#1b285f',
    950: '#000000',
  },
}

SCSS

$custom: #1b285f;
$custom-light: #61618d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b285f",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 95
  },
  "hsl": {
    "h": 228.529,
    "s": 55.738,
    "l": 23.922
  },
  "oklch": {
    "l": 0.30101,
    "c": 0.09916,
    "h": 269.5
  },
  "luminance": 0.02577
}

Semantic roles & 50–950 ramp

primary

#1B285F

secondary

#958541

accent

#C249DF

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05050C

muted

#7A797D

Preview Lab

Preview with #1B285F

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

Preview Lab → · Contrast checker → · Palette generator →