#1B3373#1B3373

#1B3373 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.3% C 0.114 H 265.3°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B3373
RGB	rgb(27, 51, 115)
HSL	hsl(224, 62%, 28%)
HSV	hsv(224, 77%, 45%)
CMYK	cmyk(76.5%, 55.7%, 0%, 54.9%)
CIE-LAB	lab(23.13, 15.24, -39.61)
CIE-LCH	lch(23.13, 42.44, 291.05°)
OKLab	oklab(34.28% -0.0094 -0.114)
OKLCH	oklch(34.28% 0.114 265.3)
XYZ	xyz(4.7292, 3.8380, 16.7079)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3373 #735B1B

analogous

#1B5F73 #1B3373 #2F1B73

triadic

#1B3373 #731B33 #33731B

tetradic

#1B3373 #731B5F #735B1B #1B732F

square

#1B3373 #731B5F #735B1B #1B732F

split-complementary

#1B3373 #732F1B #5F731B

monochromatic

#060B19 #0F1D41 #1B3373 #2749A5 #3862D0

Accessibility & contrast

On white

11.88

#1B3373 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B3373 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3373

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3373	#FFFFFF	#000000	##FFFFFF
##1B3373	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#053B75

Deuteranopia (green-blind)

#003372

Tritanopia (blue-blind)

#00424D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b3373;
/* rgb */ color: rgb(27, 51, 115);
/* oklch */ color: oklch(34.3% 0.114 265.3);

Tailwind

colors: {
  custom: {
    50: '#656a9c',
    500: '#1b3373',
    950: '#000000',
  },
}

SCSS

$custom: #1b3373;
$custom-light: #656a9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3373",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 115
  },
  "hsl": {
    "h": 223.636,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34279,
    "c": 0.11442,
    "h": 265.3
  },
  "luminance": 0.03838
}

Semantic roles & 50–950 ramp

primary

#1B3373

secondary

#A88C42

accent

#B943E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3373

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

Preview Lab → · Contrast checker → · Palette generator →