#1B285E#1B285E

#1B285E is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.0% C 0.098 H 269.5°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#1B285E
RGB	rgb(27, 40, 94)
HSL	hsl(228, 55%, 24%)
HSV	hsv(228, 71%, 37%)
CMYK	cmyk(71.3%, 57.4%, 0%, 63.1%)
CIE-LAB	lab(18.18, 14.63, -33.96)
CIE-LCH	lch(18.18, 36.98, 293.31°)
OKLab	oklab(30.01% -0.0009 -0.0976)
OKLCH	oklch(30.01% 0.098 269.5)
XYZ	xyz(3.2305, 2.5584, 10.9111)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B285E #5E511B

analogous

#1B495E #1B285E #2F1B5E

triadic

#1B285E #5E1B28 #285E1B

tetradic

#1B285E #5E1B49 #5E511B #1B5E2F

square

#1B285E #5E1B49 #5E511B #1B5E2F

split-complementary

#1B285E #5E2F1B #495E1B

monochromatic

#070A18 #0D142E #1B285E #293C8E #3650BD

Accessibility & contrast

On white

13.89

#1B285E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B285E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B285E

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B285E	#FFFFFF	#000000	##FFFFFF
##1B285E	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#043060

Deuteranopia (green-blind)

#00295D

Tritanopia (blue-blind)

#00353E

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b285e;
/* rgb */ color: rgb(27, 40, 94);
/* oklch */ color: oklch(30.0% 0.098 269.5);

Tailwind

colors: {
  custom: {
    50: '#60618c',
    500: '#1b285e',
    950: '#000000',
  },
}

SCSS

$custom: #1b285e;
$custom-light: #60618c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b285e",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 94
  },
  "hsl": {
    "h": 228.358,
    "s": 55.372,
    "l": 23.725
  },
  "oklch": {
    "l": 0.30015,
    "c": 0.0976,
    "h": 269.5
  },
  "luminance": 0.02559
}

Semantic roles & 50–950 ramp

primary

#1B285E

secondary

#948441

accent

#C249DF

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05050C

muted

#7A797D

Preview Lab

Preview with #1B285E

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

Preview Lab → · Contrast checker → · Palette generator →