#1B2863#1B2863

#1B2863 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.5% C 0.105 H 269.7°. Best body text is #FFFFFF at 13.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B2863
RGB	rgb(27, 40, 99)
HSL	hsl(229, 57%, 25%)
HSV	hsv(229, 73%, 39%)
CMYK	cmyk(72.7%, 59.6%, 0%, 61.2%)
CIE-LAB	lab(18.59, 16.65, -36.60)
CIE-LCH	lch(18.59, 40.21, 294.47°)
OKLab	oklab(30.45% -0.0006 -0.1054)
OKLCH	oklch(30.45% 0.105 269.7)
XYZ	xyz(3.4621, 2.6511, 12.1312)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2863 #63561B

analogous

#1B4C63 #1B2863 #321B63

triadic

#1B2863 #631B28 #28631B

tetradic

#1B2863 #631B4C #63561B #1B6332

square

#1B2863 #631B4C #63561B #1B6332

split-complementary

#1B2863 #63321B #4C631B

monochromatic

#070A18 #0E1533 #1B2863 #283B93 #354FC3

Accessibility & contrast

On white

13.72

#1B2863 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B2863 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2863

13.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2863	#FFFFFF	#000000	##FFFFFF
##1B2863	1.00	13.72	1.53	13.72
#FFFFFF	13.72	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003165

Deuteranopia (green-blind)

#002A62

Tritanopia (blue-blind)

#003641

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b2863;
/* rgb */ color: rgb(27, 40, 99);
/* oklch */ color: oklch(30.5% 0.105 269.7);

Tailwind

colors: {
  custom: {
    50: '#626190',
    500: '#1b2863',
    950: '#000000',
  },
}

SCSS

$custom: #1b2863;
$custom-light: #626190;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2863",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 99
  },
  "hsl": {
    "h": 229.167,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.30451,
    "c": 0.10536,
    "h": 269.7
  },
  "luminance": 0.02651
}

Semantic roles & 50–950 ramp

primary

#1B2863

secondary

#988941

accent

#C547E0

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06050C

muted

#7A797D

Preview Lab

Preview with #1B2863

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

Preview Lab → · Contrast checker → · Palette generator →