#665EFB#665EFB

#665EFB is a mid, highly saturated blue. Relative luminance 0.178; OKLCH L 58.2% C 0.226 H 279.0°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#665EFB
RGB	rgb(102, 94, 251)
HSL	hsl(243, 95%, 68%)
HSV	hsv(243, 63%, 98%)
CMYK	cmyk(59.4%, 62.5%, 0%, 1.6%)
CIE-LAB	lab(49.24, 47.01, -77.45)
CIE-LCH	lch(49.24, 90.60, 301.26°)
OKLab	oklab(58.19% 0.0353 -0.2229)
OKLCH	oklch(58.19% 0.226 279)
XYZ	xyz(26.8892, 17.7932, 93.2656)
Luminance	0.1779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665EFB #F3FB5E

analogous

#5EA5FB #665EFB #B45EFB

triadic

#665EFB #FB665E #5EFB66

tetradic

#665EFB #FB5EA5 #F3FB5E #5EFBB4

square

#665EFB #FB5EA5 #F3FB5E #5EFBB4

split-complementary

#665EFB #FBB45E #A5FB5E

monochromatic

#1005D9 #2D22FA #665EFB #9F9AFC #D7D5FE

Accessibility & contrast

On white

4.61

#665EFB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#665EFB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #665EFB

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665EFB	#FFFFFF	#000000	##FFFFFF
##665EFB	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BFF

Deuteranopia (green-blind)

#006FF8

Tritanopia (blue-blind)

#0085A4

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #665efb;
/* rgb */ color: rgb(102, 94, 251);
/* oklch */ color: oklch(58.2% 0.226 279.0);

Tailwind

colors: {
  custom: {
    50: '#9f8cfe',
    500: '#665efb',
    950: '#000000',
  },
}

SCSS

$custom: #665efb;
$custom-light: #9f8cfe;
$custom-dark: #000000;

JSON

{
  "hex": "#665efb",
  "rgb": {
    "r": 102,
    "g": 94,
    "b": 251
  },
  "hsl": {
    "h": 243.057,
    "s": 95.152,
    "l": 67.647
  },
  "oklch": {
    "l": 0.58195,
    "c": 0.2257,
    "h": 279
  },
  "luminance": 0.17795
}

Semantic roles & 50–950 ramp

primary

#665EFB

secondary

#F0F3C2

accent

#E600DA

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C18

muted

#7F7D86

Preview Lab

Preview with #665EFB

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

Preview Lab → · Contrast checker → · Palette generator →