#1B306D#1B306D

#1B306D is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.1% C 0.109 H 266.2°. Best body text is #FFFFFF at 12.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B306D
RGB	rgb(27, 48, 109)
HSL	hsl(225, 60%, 27%)
HSV	hsv(225, 75%, 43%)
CMYK	cmyk(75.2%, 56%, 0%, 57.3%)
CIE-LAB	lab(21.77, 14.94, -37.97)
CIE-LCH	lch(21.77, 40.80, 291.48°)
OKLab	oklab(33.1% -0.0073 -0.1092)
OKLCH	oklch(33.1% 0.109 266.2)
XYZ	xyz(4.2683, 3.4506, 14.9061)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B306D #6D581B

analogous

#1B596D #1B306D #2F1B6D

triadic

#1B306D #6D1B30 #306D1B

tetradic

#1B306D #6D1B59 #6D581B #1B6D2F

square

#1B306D #6D1B59 #6D581B #1B6D2F

split-complementary

#1B306D #6D2F1B #596D1B

monochromatic

#060B19 #0F1A3C #1B306D #27469E #355CCD

Accessibility & contrast

On white

12.42

#1B306D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B306D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B306D

12.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B306D	#FFFFFF	#000000	##FFFFFF
##1B306D	1.00	12.42	1.69	12.42
#FFFFFF	12.42	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05386F

Deuteranopia (green-blind)

#00316C

Tritanopia (blue-blind)

#003F49

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b306d;
/* rgb */ color: rgb(27, 48, 109);
/* oklch */ color: oklch(33.1% 0.109 266.2);

Tailwind

colors: {
  custom: {
    50: '#646797',
    500: '#1b306d',
    950: '#000000',
  },
}

SCSS

$custom: #1b306d;
$custom-light: #646797;
$custom-dark: #000000;

JSON

{
  "hex": "#1b306d",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 109
  },
  "hsl": {
    "h": 224.634,
    "s": 60.294,
    "l": 26.667
  },
  "oklch": {
    "l": 0.33098,
    "c": 0.10948,
    "h": 266.2
  },
  "luminance": 0.03451
}

Semantic roles & 50–950 ramp

primary

#1B306D

secondary

#A28942

accent

#BB44E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B306D

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

Preview Lab → · Contrast checker → · Palette generator →