#1B478F#1B478F

#1B478F is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.1% C 0.129 H 259.9°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B478F
RGB	rgb(27, 71, 143)
HSL	hsl(217, 68%, 33%)
HSV	hsv(217, 81%, 56%)
CMYK	cmyk(81.1%, 50.3%, 0%, 43.9%)
CIE-LAB	lab(31.16, 12.69, -44.14)
CIE-LCH	lch(31.16, 45.93, 286.04°)
OKLab	oklab(41.07% -0.0226 -0.1269)
OKLCH	oklch(41.07% 0.129 259.9)
XYZ	xyz(7.6614, 6.7218, 26.8749)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B478F #8F631B

analogous

#1B818F #1B478F #291B8F

triadic

#1B478F #8F1B47 #478F1B

tetradic

#1B478F #8F1B81 #8F631B #1B8F29

square

#1B478F #8F1B81 #8F631B #1B8F29

split-complementary

#1B478F #8F291B #818F1B

monochromatic

#081428 #112D5C #1B478F #2561C2 #4880DC

Accessibility & contrast

On white

8.96

#1B478F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1B478F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B478F

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B478F	#FFFFFF	#000000	##FFFFFF
##1B478F	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4F92

Deuteranopia (green-blind)

#00448E

Tritanopia (blue-blind)

#005864

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b478f;
/* rgb */ color: rgb(27, 71, 143);
/* oklch */ color: oklch(41.1% 0.129 259.9);

Tailwind

colors: {
  custom: {
    50: '#6b79b0',
    500: '#1b478f',
    950: '#000000',
  },
}

SCSS

$custom: #1b478f;
$custom-light: #6b79b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b478f",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 143
  },
  "hsl": {
    "h": 217.241,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.41068,
    "c": 0.12895,
    "h": 259.9
  },
  "luminance": 0.06723
}

Semantic roles & 50–950 ramp

primary

#1B478F

secondary

#BE9148

accent

#A93DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B478F

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

Preview Lab → · Contrast checker → · Palette generator →