#1B336F#1B336F

#1B336F is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.9% C 0.108 H 264.8°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B336F
RGB	rgb(27, 51, 111)
HSL	hsl(223, 61%, 27%)
HSV	hsv(223, 76%, 44%)
CMYK	cmyk(75.7%, 54.1%, 0%, 56.5%)
CIE-LAB	lab(22.82, 13.61, -37.55)
CIE-LCH	lch(22.82, 39.94, 289.92°)
OKLab	oklab(33.95% -0.0098 -0.1079)
OKLCH	oklch(33.95% 0.108 264.8)
XYZ	xyz(4.5041, 3.7479, 15.5219)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B336F #6F571B

analogous

#1B5D6F #1B336F #2D1B6F

triadic

#1B336F #6F1B33 #336F1B

tetradic

#1B336F #6F1B5D #6F571B #1B6F2D

square

#1B336F #6F1B5D #6F571B #1B6F2D

split-complementary

#1B336F #6F2D1B #5D6F1B

monochromatic

#060B19 #0F1C3E #1B336F #274AA0 #3662CE

Accessibility & contrast

On white

12.00

#1B336F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1B336F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B336F

12.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B336F	#FFFFFF	#000000	##FFFFFF
##1B336F	1.00	12.00	1.75	12.00
#FFFFFF	12.00	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D3B71

Deuteranopia (green-blind)

#00336E

Tritanopia (blue-blind)

#00414B

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b336f;
/* rgb */ color: rgb(27, 51, 111);
/* oklch */ color: oklch(33.9% 0.108 264.8);

Tailwind

colors: {
  custom: {
    50: '#646a99',
    500: '#1b336f',
    950: '#000000',
  },
}

SCSS

$custom: #1b336f;
$custom-light: #646a99;
$custom-dark: #000000;

JSON

{
  "hex": "#1b336f",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 111
  },
  "hsl": {
    "h": 222.857,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.33947,
    "c": 0.1084,
    "h": 264.8
  },
  "luminance": 0.03748
}

Semantic roles & 50–950 ramp

primary

#1B336F

secondary

#A48842

accent

#B644E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B336F

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

Preview Lab → · Contrast checker → · Palette generator →