#666BFD#666BFD

#666BFD is a mid, highly saturated blue. Relative luminance 0.204; OKLCH L 60.5% C 0.213 H 276.5°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#666BFD
RGB	rgb(102, 107, 253)
HSL	hsl(238, 97%, 70%)
HSV	hsv(238, 60%, 99%)
CMYK	cmyk(59.7%, 57.7%, 0%, 0.8%)
CIE-LAB	lab(52.32, 40.03, -73.55)
CIE-LCH	lch(52.32, 83.74, 298.55°)
OKLab	oklab(60.5% 0.024 -0.2114)
OKLCH	oklch(60.5% 0.213 276.5)
XYZ	xyz(28.4611, 20.4298, 95.3530)
Luminance	0.2043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BFD #FDF866

analogous

#66B7FD #666BFD #AC66FD

triadic

#666BFD #FD666B #6BFD66

tetradic

#666BFD #FD66B7 #FDF866 #66FDAC

square

#666BFD #FD66B7 #FDF866 #66FDAC

split-complementary

#666BFD #FDAC66 #B7FD66

monochromatic

#030BE6 #2A31FC #666BFD #A2A5FE #DFE0FF

Accessibility & contrast

On white

4.13

#666BFD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#666BFD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BFD

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BFD	#FFFFFF	#000000	##000000
##666BFD	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0083FF

Deuteranopia (green-blind)

#0076FA

Tritanopia (blue-blind)

#008EAA

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #666bfd;
/* rgb */ color: rgb(102, 107, 253);
/* oklch */ color: oklch(60.5% 0.213 276.5);

Tailwind

colors: {
  custom: {
    50: '#9f95ff',
    500: '#666bfd',
    950: '#000000',
  },
}

SCSS

$custom: #666bfd;
$custom-light: #9f95ff;
$custom-dark: #000000;

JSON

{
  "hex": "#666bfd",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 253
  },
  "hsl": {
    "h": 238.013,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.60503,
    "c": 0.21275,
    "h": 276.5
  },
  "luminance": 0.20432
}

Semantic roles & 50–950 ramp

primary

#666BFD

secondary

#F5F4CA

accent

#DE00E6

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666BFD

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

Preview Lab → · Contrast checker → · Palette generator →