#1B335A#1B335A

#1B335A is a dark, moderate blue. Relative luminance 0.033; OKLCH L 32.3% C 0.076 H 259.7°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B335A
RGB	rgb(27, 51, 90)
HSL	hsl(217, 54%, 23%)
HSV	hsv(217, 70%, 35%)
CMYK	cmyk(70%, 43.3%, 0%, 64.7%)
CIE-LAB	lab(21.35, 5.04, -26.23)
CIE-LCH	lch(21.35, 26.71, 280.88°)
OKLab	oklab(32.35% -0.0136 -0.0747)
OKLCH	oklch(32.35% 0.076 259.7)
XYZ	xyz(3.4806, 3.3385, 10.1318)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B335A #5A421B

analogous

#1B525A #1B335A #221B5A

triadic

#1B335A #5A1B33 #335A1B

tetradic

#1B335A #5A1B52 #5A421B #1B5A22

square

#1B335A #5A1B52 #5A421B #1B5A22

split-complementary

#1B335A #5A221B #525A1B

monochromatic

#070D18 #0D182B #1B335A #294E89 #3768B8

Accessibility & contrast

On white

12.59

#1B335A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B335A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B335A

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B335A	#FFFFFF	#000000	##FFFFFF
##1B335A	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21365C

Deuteranopia (green-blind)

#183159

Tritanopia (blue-blind)

#003C42

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b335a;
/* rgb */ color: rgb(27, 51, 90);
/* oklch */ color: oklch(32.3% 0.076 259.7);

Tailwind

colors: {
  custom: {
    50: '#5f6a89',
    500: '#1b335a',
    950: '#000000',
  },
}

SCSS

$custom: #1b335a;
$custom-light: #5f6a89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b335a",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 90
  },
  "hsl": {
    "h": 217.143,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.32349,
    "c": 0.07593,
    "h": 259.7
  },
  "luminance": 0.03339
}

Semantic roles & 50–950 ramp

primary

#1B335A

secondary

#907241

accent

#A54BDD

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B335A

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

Preview Lab → · Contrast checker → · Palette generator →