#1B335B#1B335B

#1B335B is a dark, moderate blue. Relative luminance 0.034; OKLCH L 32.4% C 0.077 H 260.0°. Best body text is #FFFFFF at 12.57:1 contrast (WCAG AA passes).

Color values

HEX	#1B335B
RGB	rgb(27, 51, 91)
HSL	hsl(218, 54%, 23%)
HSV	hsv(218, 70%, 36%)
CMYK	cmyk(70.3%, 44%, 0%, 64.3%)
CIE-LAB	lab(21.42, 5.44, -26.79)
CIE-LCH	lch(21.42, 27.34, 281.49°)
OKLab	oklab(32.42% -0.0134 -0.0763)
OKLCH	oklch(32.42% 0.077 260)
XYZ	xyz(3.5235, 3.3557, 10.3575)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B335B #5B431B

analogous

#1B535B #1B335B #231B5B

triadic

#1B335B #5B1B33 #335B1B

tetradic

#1B335B #5B1B53 #5B431B #1B5B23

square

#1B335B #5B1B53 #5B431B #1B5B23

split-complementary

#1B335B #5B231B #535B1B

monochromatic

#070D18 #0D192C #1B335B #294D8A #3768B9

Accessibility & contrast

On white

12.57

#1B335B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B335B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B335B

12.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B335B	#FFFFFF	#000000	##FFFFFF
##1B335B	1.00	12.57	1.67	12.57
#FFFFFF	12.57	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21375D

Deuteranopia (green-blind)

#17315A

Tritanopia (blue-blind)

#003C42

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b335b;
/* rgb */ color: rgb(27, 51, 91);
/* oklch */ color: oklch(32.4% 0.077 260.0);

Tailwind

colors: {
  custom: {
    50: '#5f6a89',
    500: '#1b335b',
    950: '#000000',
  },
}

SCSS

$custom: #1b335b;
$custom-light: #5f6a89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b335b",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 91
  },
  "hsl": {
    "h": 217.5,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.32419,
    "c": 0.07749,
    "h": 260
  },
  "luminance": 0.03356
}

Semantic roles & 50–950 ramp

primary

#1B335B

secondary

#917341

accent

#A64ADE

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B335B

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

Preview Lab → · Contrast checker → · Palette generator →