#577FF3#577FF3

#577FF3 is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.7% C 0.179 H 266.9°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#577FF3
RGB	rgb(87, 127, 243)
HSL	hsl(225, 87%, 65%)
HSV	hsv(225, 64%, 95%)
CMYK	cmyk(64.2%, 47.7%, 0%, 4.7%)
CIE-LAB	lab(55.76, 22.16, -62.49)
CIE-LCH	lch(55.76, 66.31, 289.52°)
OKLab	oklab(62.65% -0.0098 -0.179)
OKLCH	oklch(62.65% 0.179 266.9)
XYZ	xyz(27.6919, 23.6735, 87.8867)
Luminance	0.2368 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FF3 #F3CB57

analogous

#57CDF3 #577FF3 #7D57F3

triadic

#577FF3 #F3577F #7FF357

tetradic

#577FF3 #F357CD #F3CB57 #57F37D

square

#577FF3 #F357CD #F3CB57 #57F37D

split-complementary

#577FF3 #F37D57 #CDF357

monochromatic

#0E3CC2 #1E53EF #577FF3 #90ABF7 #C9D6FB

Accessibility & contrast

On white

3.66

#577FF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#577FF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FF3

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FF3	#FFFFFF	#000000	##000000
##577FF3	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#428DF7

Deuteranopia (green-blind)

#1F7FF1

Tritanopia (blue-blind)

#009AAD

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #577ff3;
/* rgb */ color: rgb(87, 127, 243);
/* oklch */ color: oklch(62.7% 0.179 266.9);

Tailwind

colors: {
  custom: {
    50: '#95a3f8',
    500: '#577ff3',
    950: '#000000',
  },
}

SCSS

$custom: #577ff3;
$custom-light: #95a3f8;
$custom-dark: #000000;

JSON

{
  "hex": "#577ff3",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 243
  },
  "hsl": {
    "h": 224.615,
    "s": 86.667,
    "l": 64.706
  },
  "oklch": {
    "l": 0.62654,
    "c": 0.17923,
    "h": 266.9
  },
  "luminance": 0.23676
}

Semantic roles & 50–950 ramp

primary

#577FF3

secondary

#EEE0B8

accent

#AA02E3

background

#F9FAFF

surface

#F2F3FF

border

#CCCDD7

text

#0F0F17

muted

#7E7F85

Preview Lab

Preview with #577FF3

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

Preview Lab → · Contrast checker → · Palette generator →