#1B3679#1B3679

#1B3679 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.5% C 0.119 H 264.5°. Best body text is #FFFFFF at 11.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B3679
RGB	rgb(27, 54, 121)
HSL	hsl(223, 64%, 29%)
HSV	hsv(223, 78%, 47%)
CMYK	cmyk(77.7%, 55.4%, 0%, 52.5%)
CIE-LAB	lab(24.49, 15.56, -41.23)
CIE-LCH	lch(24.49, 44.07, 290.68°)
OKLab	oklab(35.46% -0.0114 -0.1187)
OKLCH	oklch(35.46% 0.119 264.5)
XYZ	xyz(5.2211, 4.2512, 18.6309)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3679 #795E1B

analogous

#1B6579 #1B3679 #2F1B79

triadic

#1B3679 #791B36 #36791B

tetradic

#1B3679 #791B65 #795E1B #1B792F

square

#1B3679 #791B65 #795E1B #1B792F

split-complementary

#1B3679 #792F1B #65791B

monochromatic

#060B19 #102047 #1B3679 #264CAB #3B67D3

Accessibility & contrast

On white

11.35

#1B3679 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3679 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3679

11.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3679	#FFFFFF	#000000	##FFFFFF
##1B3679	1.00	11.35	1.85	11.35
#FFFFFF	11.35	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#043F7B

Deuteranopia (green-blind)

#003678

Tritanopia (blue-blind)

#004652

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3679;
/* rgb */ color: rgb(27, 54, 121);
/* oklch */ color: oklch(35.5% 0.119 264.5);

Tailwind

colors: {
  custom: {
    50: '#666ca0',
    500: '#1b3679',
    950: '#000000',
  },
}

SCSS

$custom: #1b3679;
$custom-light: #666ca0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3679",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 121
  },
  "hsl": {
    "h": 222.766,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.35455,
    "c": 0.11929,
    "h": 264.5
  },
  "luminance": 0.04252
}

Semantic roles & 50–950 ramp

primary

#1B3679

secondary

#AD8F43

accent

#B741E7

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060F

muted

#7A7A7E

Preview Lab

Preview with #1B3679

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

Preview Lab → · Contrast checker → · Palette generator →