#1F53B4#1F53B4

#1F53B4 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.7% C 0.164 H 261.4°. Best body text is #FFFFFF at 7.11:1 contrast (WCAG AA passes).

Color values

HEX	#1F53B4
RGB	rgb(31, 83, 180)
HSL	hsl(219, 71%, 41%)
HSV	hsv(219, 83%, 71%)
CMYK	cmyk(82.8%, 53.9%, 0%, 29.4%)
CIE-LAB	lab(37.43, 19.79, -56.22)
CIE-LCH	lch(37.43, 59.61, 289.39°)
OKLab	oklab(46.74% -0.0244 -0.1622)
OKLCH	oklch(46.74% 0.164 261.4)
XYZ	xyz(11.8936, 9.7717, 44.4304)
Luminance	0.0977 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F53B4 #B4801F

analogous

#1F9EB4 #1F53B4 #351FB4

triadic

#1F53B4 #B41F53 #53B41F

tetradic

#1F53B4 #B41F9E #B4801F #1FB435

square

#1F53B4 #B41F9E #B4801F #1FB435

split-complementary

#1F53B4 #B4351F #9EB41F

monochromatic

#0D234C #163B80 #1F53B4 #346FDC #6894E5

Accessibility & contrast

On white

7.11

#1F53B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#1F53B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F53B4

7.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F53B4	#FFFFFF	#000000	##FFFFFF
##1F53B4	1.00	7.11	2.95	7.11
#FFFFFF	7.11	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB7

Deuteranopia (green-blind)

#0052B2

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1f53b4;
/* rgb */ color: rgb(31, 83, 180);
/* oklch */ color: oklch(46.7% 0.164 261.4);

Tailwind

colors: {
  custom: {
    50: '#7582cb',
    500: '#1f53b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f53b4;
$custom-light: #7582cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f53b4",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 180
  },
  "hsl": {
    "h": 219.06,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.46737,
    "c": 0.16403,
    "h": 261.4
  },
  "luminance": 0.09773
}

Semantic roles & 50–950 ramp

primary

#1F53B4

secondary

#CBA764

accent

#AF3AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1F53B4

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

Preview Lab → · Contrast checker → · Palette generator →