#1B306A#1B306A

#1B306A is a dark, moderate blue. Relative luminance 0.034; OKLCH L 32.8% C 0.105 H 265.8°. Best body text is #FFFFFF at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B306A
RGB	rgb(27, 48, 106)
HSL	hsl(224, 59%, 26%)
HSV	hsv(224, 75%, 42%)
CMYK	cmyk(74.5%, 54.7%, 0%, 58.4%)
CIE-LAB	lab(21.53, 13.72, -36.40)
CIE-LCH	lch(21.53, 38.90, 290.65°)
OKLab	oklab(32.85% -0.0076 -0.1046)
OKLCH	oklch(32.85% 0.105 265.8)
XYZ	xyz(4.1096, 3.3871, 14.0701)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B306A #6A551B

analogous

#1B576A #1B306A #2D1B6A

triadic

#1B306A #6A1B30 #306A1B

tetradic

#1B306A #6A1B57 #6A551B #1B6A2D

square

#1B306A #6A1B57 #6A551B #1B6A2D

split-complementary

#1B306A #6A2D1B #576A1B

monochromatic

#060B18 #0F1A39 #1B306A #27469B #345CCB

Accessibility & contrast

On white

12.52

#1B306A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B306A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B306A

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B306A	#FFFFFF	#000000	##FFFFFF
##1B306A	1.00	12.52	1.68	12.52
#FFFFFF	12.52	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B376C

Deuteranopia (green-blind)

#003069

Tritanopia (blue-blind)

#003E48

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b306a;
/* rgb */ color: rgb(27, 48, 106);
/* oklch */ color: oklch(32.8% 0.105 265.8);

Tailwind

colors: {
  custom: {
    50: '#636795',
    500: '#1b306a',
    950: '#000000',
  },
}

SCSS

$custom: #1b306a;
$custom-light: #636795;
$custom-dark: #000000;

JSON

{
  "hex": "#1b306a",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 106
  },
  "hsl": {
    "h": 224.051,
    "s": 59.398,
    "l": 26.078
  },
  "oklch": {
    "l": 0.32848,
    "c": 0.10492,
    "h": 265.8
  },
  "luminance": 0.03388
}

Semantic roles & 50–950 ramp

primary

#1B306A

secondary

#9F8642

accent

#B945E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B306A

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

Preview Lab → · Contrast checker → · Palette generator →