#646ECF#646ECF

#646ECF is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.7% C 0.148 H 276.3°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#646ECF
RGB	rgb(100, 110, 207)
HSL	hsl(234, 53%, 60%)
HSV	hsv(234, 52%, 81%)
CMYK	cmyk(51.7%, 46.9%, 0%, 18.8%)
CIE-LAB	lab(49.94, 23.21, -51.55)
CIE-LCH	lch(49.94, 56.54, 294.24°)
OKLab	oklab(57.73% 0.0162 -0.1467)
OKLCH	oklch(57.73% 0.148 276.3)
XYZ	xyz(22.0904, 18.3648, 61.4001)
Luminance	0.1837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646ECF #CFC564

analogous

#64A3CF #646ECF #9064CF

triadic

#646ECF #CF646E #6ECF64

tetradic

#646ECF #CF64A3 #CFC564 #64CF90

square

#646ECF #CF64A3 #CFC564 #64CF90

split-complementary

#646ECF #CF9064 #A3CF64

monochromatic

#2C358D #3A46BC #646ECF #939ADD #C1C5EC

Accessibility & contrast

On white

4.49

#646ECF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.67

#646ECF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646ECF

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646ECF	#FFFFFF	#000000	##000000
##646ECF	1.00	4.49	4.67	4.67
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#437BD3

Deuteranopia (green-blind)

#3773CD

Tritanopia (blue-blind)

#368394

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646ecf;
/* rgb */ color: rgb(100, 110, 207);
/* oklch */ color: oklch(57.7% 0.148 276.3);

Tailwind

colors: {
  custom: {
    50: '#9797de',
    500: '#646ecf',
    950: '#000000',
  },
}

SCSS

$custom: #646ecf;
$custom-light: #9797de;
$custom-dark: #000000;

JSON

{
  "hex": "#646ecf",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 207
  },
  "hsl": {
    "h": 234.393,
    "s": 52.709,
    "l": 60.196
  },
  "oklch": {
    "l": 0.5773,
    "c": 0.14761,
    "h": 276.3
  },
  "luminance": 0.18366
}

Semantic roles & 50–950 ramp

primary

#646ECF

secondary

#DCD8B3

accent

#B225C0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646ECF

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

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