#1B55AA#1B55AA

#1B55AA is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.3% C 0.149 H 258.7°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B55AA
RGB	rgb(27, 85, 170)
HSL	hsl(216, 73%, 39%)
HSV	hsv(216, 84%, 67%)
CMYK	cmyk(84.1%, 50%, 0%, 33.3%)
CIE-LAB	lab(37.17, 14.13, -50.73)
CIE-LCH	lch(37.17, 52.66, 285.56°)
OKLab	oklab(46.28% -0.0293 -0.1461)
OKLCH	oklch(46.28% 0.149 258.7)
XYZ	xyz(10.9535, 9.6309, 39.3041)
Luminance	0.0963 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B55AA #AA701B

analogous

#1B9CAA #1B55AA #281BAA

triadic

#1B55AA #AA1B55 #55AA1B

tetradic

#1B55AA #AA1B9C #AA701B #1BAA28

square

#1B55AA #AA1B9C #AA701B #1BAA28

split-complementary

#1B55AA #AA281B #9CAA1B

monochromatic

#0A2040 #133B75 #1B55AA #2670DC #5B93E5

Accessibility & contrast

On white

7.18

#1B55AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#1B55AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B55AA

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B55AA	#FFFFFF	#000000	##FFFFFF
##1B55AA	1.00	7.18	2.93	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#215EAD

Deuteranopia (green-blind)

#0051A8

Tritanopia (blue-blind)

#006A77

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b55aa;
/* rgb */ color: rgb(27, 85, 170);
/* oklch */ color: oklch(46.3% 0.149 258.7);

Tailwind

colors: {
  custom: {
    50: '#7184c4',
    500: '#1b55aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b55aa;
$custom-light: #7184c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b55aa",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 170
  },
  "hsl": {
    "h": 215.664,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.46281,
    "c": 0.14896,
    "h": 258.7
  },
  "luminance": 0.09632
}

Semantic roles & 50–950 ramp

primary

#1B55AA

secondary

#C99B58

accent

#A539EF

background

#F7F8FC

surface

#EDEFF8

border

#C8CAD1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1B55AA

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

Preview Lab → · Contrast checker → · Palette generator →