#1B336E#1B336E

#1B336E is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.9% C 0.107 H 264.6°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B336E
RGB	rgb(27, 51, 110)
HSL	hsl(223, 61%, 27%)
HSV	hsv(223, 75%, 43%)
CMYK	cmyk(75.5%, 53.6%, 0%, 56.9%)
CIE-LAB	lab(22.74, 13.20, -37.03)
CIE-LCH	lch(22.74, 39.31, 289.62°)
OKLab	oklab(33.87% -0.01 -0.1064)
OKLCH	oklch(33.87% 0.107 264.6)
XYZ	xyz(4.4493, 3.7260, 15.2335)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B336E #6E561B

analogous

#1B5D6E #1B336E #2D1B6E

triadic

#1B336E #6E1B33 #336E1B

tetradic

#1B336E #6E1B5D #6E561B #1B6E2D

square

#1B336E #6E1B5D #6E561B #1B6E2D

split-complementary

#1B336E #6E2D1B #5D6E1B

monochromatic

#060B19 #0F1C3D #1B336E #274A9F #3662CE

Accessibility & contrast

On white

12.03

#1B336E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1B336E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B336E

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B336E	#FFFFFF	#000000	##FFFFFF
##1B336E	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E3A70

Deuteranopia (green-blind)

#00336D

Tritanopia (blue-blind)

#00414B

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b336e;
/* rgb */ color: rgb(27, 51, 110);
/* oklch */ color: oklch(33.9% 0.107 264.6);

Tailwind

colors: {
  custom: {
    50: '#646a98',
    500: '#1b336e',
    950: '#000000',
  },
}

SCSS

$custom: #1b336e;
$custom-light: #646a98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b336e",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 110
  },
  "hsl": {
    "h": 222.651,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.33866,
    "c": 0.10689,
    "h": 264.6
  },
  "luminance": 0.03726
}

Semantic roles & 50–950 ramp

primary

#1B336E

secondary

#A38742

accent

#B644E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B336E

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

Preview Lab → · Contrast checker → · Palette generator →