#1B3673#1B3673

#1B3673 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 35.0% C 0.110 H 263.7°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B3673
RGB	rgb(27, 54, 115)
HSL	hsl(222, 62%, 28%)
HSV	hsv(222, 77%, 45%)
CMYK	cmyk(76.5%, 53%, 0%, 54.9%)
CIE-LAB	lab(24.03, 13.11, -38.16)
CIE-LCH	lch(24.03, 40.35, 288.96°)
OKLab	oklab(34.96% -0.0121 -0.1097)
OKLCH	oklch(34.96% 0.11 263.7)
XYZ	xyz(4.8646, 4.1086, 16.7530)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3673 #73581B

analogous

#1B6273 #1B3673 #2C1B73

triadic

#1B3673 #731B36 #36731B

tetradic

#1B3673 #731B62 #73581B #1B732C

square

#1B3673 #731B62 #73581B #1B732C

split-complementary

#1B3673 #732C1B #62731B

monochromatic

#060C19 #0F1F41 #1B3673 #274DA5 #3867D0

Accessibility & contrast

On white

11.53

#1B3673 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1B3673 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3673

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3673	#FFFFFF	#000000	##FFFFFF
##1B3673	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#103D75

Deuteranopia (green-blind)

#003572

Tritanopia (blue-blind)

#00454F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3673;
/* rgb */ color: rgb(27, 54, 115);
/* oklch */ color: oklch(35.0% 0.110 263.7);

Tailwind

colors: {
  custom: {
    50: '#656c9c',
    500: '#1b3673',
    950: '#000000',
  },
}

SCSS

$custom: #1b3673;
$custom-light: #656c9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3673",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 115
  },
  "hsl": {
    "h": 221.591,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34962,
    "c": 0.11036,
    "h": 263.7
  },
  "luminance": 0.04109
}

Semantic roles & 50–950 ramp

primary

#1B3673

secondary

#A88842

accent

#B343E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3673

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

Preview Lab → · Contrast checker → · Palette generator →