#1B53AA#1B53AA

#1B53AA is a mid, vivid blue. Relative luminance 0.093; OKLCH L 45.8% C 0.151 H 259.4°. Best body text is #FFFFFF at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B53AA
RGB	rgb(27, 83, 170)
HSL	hsl(217, 73%, 39%)
HSV	hsv(217, 84%, 67%)
CMYK	cmyk(84.1%, 51.2%, 0%, 33.3%)
CIE-LAB	lab(36.59, 15.46, -51.66)
CIE-LCH	lch(36.59, 53.93, 286.66°)
OKLab	oklab(45.84% -0.0278 -0.1488)
OKLCH	oklch(45.84% 0.151 259.4)
XYZ	xyz(10.7983, 9.3205, 39.2523)
Luminance	0.0932 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B53AA #AA721B

analogous

#1B9AAA #1B53AA #2A1BAA

triadic

#1B53AA #AA1B53 #53AA1B

tetradic

#1B53AA #AA1B9A #AA721B #1BAA2A

square

#1B53AA #AA1B9A #AA721B #1BAA2A

split-complementary

#1B53AA #AA2A1B #9AAA1B

monochromatic

#0A1F40 #133975 #1B53AA #266DDC #5B91E5

Accessibility & contrast

On white

7.33

#1B53AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#1B53AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B53AA

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B53AA	#FFFFFF	#000000	##FFFFFF
##1B53AA	1.00	7.33	2.86	7.33
#FFFFFF	7.33	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A5DAD

Deuteranopia (green-blind)

#0050A8

Tritanopia (blue-blind)

#006876

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b53aa;
/* rgb */ color: rgb(27, 83, 170);
/* oklch */ color: oklch(45.8% 0.151 259.4);

Tailwind

colors: {
  custom: {
    50: '#7182c4',
    500: '#1b53aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b53aa;
$custom-light: #7182c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b53aa",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 170
  },
  "hsl": {
    "h": 216.503,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.45839,
    "c": 0.15142,
    "h": 259.4
  },
  "luminance": 0.09322
}

Semantic roles & 50–950 ramp

primary

#1B53AA

secondary

#C99D58

accent

#A839EF

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1B53AA

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

Preview Lab → · Contrast checker → · Palette generator →