#1B306F#1B306F

#1B306F is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.3% C 0.113 H 266.4°. Best body text is #FFFFFF at 12.36:1 contrast (WCAG AA passes).

Color values

HEX	#1B306F
RGB	rgb(27, 48, 111)
HSL	hsl(225, 61%, 27%)
HSV	hsv(225, 76%, 44%)
CMYK	cmyk(75.7%, 56.8%, 0%, 56.5%)
CIE-LAB	lab(21.92, 15.76, -39.00)
CIE-LCH	lch(21.92, 42.06, 292.00°)
OKLab	oklab(33.27% -0.0071 -0.1123)
OKLCH	oklch(33.27% 0.113 266.4)
XYZ	xyz(4.3772, 3.4942, 15.4796)
Luminance	0.0350 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B306F #6F5A1B

analogous

#1B5A6F #1B306F #301B6F

triadic

#1B306F #6F1B30 #306F1B

tetradic

#1B306F #6F1B5A #6F5A1B #1B6F30

square

#1B306F #6F1B5A #6F5A1B #1B6F30

split-complementary

#1B306F #6F301B #5A6F1B

monochromatic

#060B19 #0F1B3E #1B306F #2745A0 #365CCE

Accessibility & contrast

On white

12.36

#1B306F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B306F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B306F

12.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B306F	#FFFFFF	#000000	##FFFFFF
##1B306F	1.00	12.36	1.70	12.36
#FFFFFF	12.36	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#013971

Deuteranopia (green-blind)

#00316E

Tritanopia (blue-blind)

#003F4A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b306f;
/* rgb */ color: rgb(27, 48, 111);
/* oklch */ color: oklch(33.3% 0.113 266.4);

Tailwind

colors: {
  custom: {
    50: '#646799',
    500: '#1b306f',
    950: '#000000',
  },
}

SCSS

$custom: #1b306f;
$custom-light: #646799;
$custom-dark: #000000;

JSON

{
  "hex": "#1b306f",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 111
  },
  "hsl": {
    "h": 225,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.33268,
    "c": 0.11251,
    "h": 266.4
  },
  "luminance": 0.03495
}

Semantic roles & 50–950 ramp

primary

#1B306F

secondary

#A48B42

accent

#BC44E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B306F

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

Preview Lab → · Contrast checker → · Palette generator →