#1F51C2#1F51C2

#1F51C2 is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.5% C 0.185 H 263.2°. Best body text is #FFFFFF at 6.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F51C2
RGB	rgb(31, 81, 194)
HSL	hsl(222, 72%, 44%)
HSV	hsv(222, 84%, 76%)
CMYK	cmyk(84%, 58.2%, 0%, 23.9%)
CIE-LAB	lab(37.97, 26.58, -63.56)
CIE-LCH	lch(37.97, 68.89, 292.70°)
OKLab	oklab(47.48% -0.0221 -0.1838)
OKLCH	oklch(47.48% 0.185 263.2)
XYZ	xyz(13.2416, 10.0696, 52.2742)
Luminance	0.1007 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F51C2 #C2901F

analogous

#1FA3C2 #1F51C2 #3F1FC2

triadic

#1F51C2 #C21F51 #51C21F

tetradic

#1F51C2 #C21FA3 #C2901F #1FC23F

square

#1F51C2 #C21FA3 #C2901F #1FC23F

split-complementary

#1F51C2 #C23F1F #A3C21F

monochromatic

#0E2558 #173B8D #1F51C2 #3E70E0 #7397E9

Accessibility & contrast

On white

6.97

#1F51C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#1F51C2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F51C2

6.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F51C2	#FFFFFF	#000000	##FFFFFF
##1F51C2	1.00	6.97	3.01	6.97
#FFFFFF	6.97	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C6

Deuteranopia (green-blind)

#0052C0

Tritanopia (blue-blind)

#006E81

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1f51c2;
/* rgb */ color: rgb(31, 81, 194);
/* oklch */ color: oklch(47.5% 0.185 263.2);

Tailwind

colors: {
  custom: {
    50: '#7881d5',
    500: '#1f51c2',
    950: '#000000',
  },
}

SCSS

$custom: #1f51c2;
$custom-light: #7881d5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f51c2",
  "rgb": {
    "r": 31,
    "g": 81,
    "b": 194
  },
  "hsl": {
    "h": 221.595,
    "s": 72.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.47482,
    "c": 0.18511,
    "h": 263.2
  },
  "luminance": 0.10071
}

Semantic roles & 50–950 ramp

primary

#1F51C2

secondary

#CFB16D

accent

#B739EF

background

#F8F7FD

surface

#EFEEFA

border

#CAC9D3

text

#0B0A14

muted

#7C7C83

Preview Lab

Preview with #1F51C2

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

Preview Lab → · Contrast checker → · Palette generator →