#1B478C#1B478C

#1B478C is a dark, vivid blue. Relative luminance 0.066; OKLCH L 40.8% C 0.125 H 259.3°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B478C
RGB	rgb(27, 71, 140)
HSL	hsl(217, 68%, 33%)
HSV	hsv(217, 81%, 55%)
CMYK	cmyk(80.7%, 49.3%, 0%, 45.1%)
CIE-LAB	lab(30.95, 11.47, -42.64)
CIE-LCH	lch(30.95, 44.15, 285.06°)
OKLab	oklab(40.84% -0.0231 -0.1225)
OKLCH	oklch(40.84% 0.125 259.3)
XYZ	xyz(7.4371, 6.6321, 25.6940)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B478C #8C601B

analogous

#1B808C #1B478C #271B8C

triadic

#1B478C #8C1B47 #478C1B

tetradic

#1B478C #8C1B80 #8C601B #1B8C27

square

#1B478C #8C1B80 #8C601B #1B8C27

split-complementary

#1B478C #8C271B #808C1B

monochromatic

#071325 #112D59 #1B478C #2561BF #4680DB

Accessibility & contrast

On white

9.03

#1B478C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1B478C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B478C

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B478C	#FFFFFF	#000000	##FFFFFF
##1B478C	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204E8F

Deuteranopia (green-blind)

#00448B

Tritanopia (blue-blind)

#005862

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b478c;
/* rgb */ color: rgb(27, 71, 140);
/* oklch */ color: oklch(40.8% 0.125 259.3);

Tailwind

colors: {
  custom: {
    50: '#6a79ae',
    500: '#1b478c',
    950: '#000000',
  },
}

SCSS

$custom: #1b478c;
$custom-light: #6a79ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b478c",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 140
  },
  "hsl": {
    "h": 216.637,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.40839,
    "c": 0.12469,
    "h": 259.3
  },
  "luminance": 0.06633
}

Semantic roles & 50–950 ramp

primary

#1B478C

secondary

#BD8F46

accent

#A73DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B478C

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

Preview Lab → · Contrast checker → · Palette generator →