#1B4178#1B4178

#1B4178 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 37.9% C 0.103 H 258.0°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B4178
RGB	rgb(27, 65, 120)
HSL	hsl(215, 63%, 29%)
HSV	hsv(215, 78%, 47%)
CMYK	cmyk(77.5%, 45.8%, 0%, 52.9%)
CIE-LAB	lab(27.76, 7.44, -35.32)
CIE-LCH	lch(27.76, 36.10, 281.90°)
OKLab	oklab(37.94% -0.0215 -0.1011)
OKLCH	oklch(37.94% 0.103 258)
XYZ	xyz(5.7312, 5.3690, 18.4999)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4178 #78521B

analogous

#1B7078 #1B4178 #241B78

triadic

#1B4178 #781B41 #41781B

tetradic

#1B4178 #781B70 #78521B #1B7824

square

#1B4178 #781B70 #78521B #1B7824

split-complementary

#1B4178 #78241B #70781B

monochromatic

#060E19 #102646 #1B4178 #265CAA #3B79D3

Accessibility & contrast

On white

10.13

#1B4178 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1B4178 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4178

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4178	#FFFFFF	#000000	##FFFFFF
##1B4178	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25467A

Deuteranopia (green-blind)

#133E77

Tritanopia (blue-blind)

#004E56

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b4178;
/* rgb */ color: rgb(27, 65, 120);
/* oklch */ color: oklch(37.9% 0.103 258.0);

Tailwind

colors: {
  custom: {
    50: '#66759f',
    500: '#1b4178',
    950: '#000000',
  },
}

SCSS

$custom: #1b4178;
$custom-light: #66759f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4178",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 120
  },
  "hsl": {
    "h": 215.484,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37941,
    "c": 0.1034,
    "h": 258
  },
  "luminance": 0.0537
}

Semantic roles & 50–950 ramp

primary

#1B4178

secondary

#AC8143

accent

#A341E6

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B4178

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

Preview Lab → · Contrast checker → · Palette generator →