#1B488F#1B488F

#1B488F is a dark, vivid blue. Relative luminance 0.069; OKLCH L 41.3% C 0.128 H 259.4°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B488F
RGB	rgb(27, 72, 143)
HSL	hsl(217, 68%, 33%)
HSV	hsv(217, 81%, 56%)
CMYK	cmyk(81.1%, 49.7%, 0%, 43.9%)
CIE-LAB	lab(31.46, 12.01, -43.66)
CIE-LCH	lch(31.46, 45.28, 285.38°)
OKLab	oklab(41.3% -0.0235 -0.1255)
OKLCH	oklch(41.3% 0.128 259.4)
XYZ	xyz(7.7255, 6.8500, 26.8963)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B488F #8F621B

analogous

#1B828F #1B488F #281B8F

triadic

#1B488F #8F1B48 #488F1B

tetradic

#1B488F #8F1B82 #8F621B #1B8F28

square

#1B488F #8F1B82 #8F621B #1B8F28

split-complementary

#1B488F #8F281B #828F1B

monochromatic

#081428 #112E5C #1B488F #2562C2 #4882DC

Accessibility & contrast

On white

8.86

#1B488F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#1B488F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B488F

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B488F	#FFFFFF	#000000	##FFFFFF
##1B488F	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F5092

Deuteranopia (green-blind)

#00458E

Tritanopia (blue-blind)

#005964

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b488f;
/* rgb */ color: rgb(27, 72, 143);
/* oklch */ color: oklch(41.3% 0.128 259.4);

Tailwind

colors: {
  custom: {
    50: '#6b7ab0',
    500: '#1b488f',
    950: '#000000',
  },
}

SCSS

$custom: #1b488f;
$custom-light: #6b7ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b488f",
  "rgb": {
    "r": 27,
    "g": 72,
    "b": 143
  },
  "hsl": {
    "h": 216.724,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.41297,
    "c": 0.12768,
    "h": 259.4
  },
  "luminance": 0.06851
}

Semantic roles & 50–950 ramp

primary

#1B488F

secondary

#BE9048

accent

#A73DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B488F

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

Preview Lab → · Contrast checker → · Palette generator →