#577BF3#577BF3

#577BF3 is a mid, vivid blue. Relative luminance 0.227; OKLCH L 61.9% C 0.184 H 268.1°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#577BF3
RGB	rgb(87, 123, 243)
HSL	hsl(226, 87%, 65%)
HSV	hsv(226, 64%, 95%)
CMYK	cmyk(64.2%, 49.4%, 0%, 4.7%)
CIE-LAB	lab(54.72, 24.60, -64.16)
CIE-LCH	lch(54.72, 68.72, 290.98°)
OKLab	oklab(61.86% -0.0061 -0.1839)
OKLCH	oklch(61.86% 0.184 268.1)
XYZ	xyz(27.1856, 22.6607, 87.7179)
Luminance	0.2266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BF3 #F3CF57

analogous

#57C9F3 #577BF3 #8157F3

triadic

#577BF3 #F3577B #7BF357

tetradic

#577BF3 #F357C9 #F3CF57 #57F381

square

#577BF3 #F357C9 #F3CF57 #57F381

split-complementary

#577BF3 #F38157 #C9F357

monochromatic

#0E37C2 #1E4EEF #577BF3 #90A8F7 #C9D5FB

Accessibility & contrast

On white

3.80

#577BF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#577BF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BF3

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BF3	#FFFFFF	#000000	##000000
##577BF3	1.00	3.80	5.53	5.53
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#388AF7

Deuteranopia (green-blind)

#047CF1

Tritanopia (blue-blind)

#0097AB

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #577bf3;
/* rgb */ color: rgb(87, 123, 243);
/* oklch */ color: oklch(61.9% 0.184 268.1);

Tailwind

colors: {
  custom: {
    50: '#95a0f8',
    500: '#577bf3',
    950: '#000000',
  },
}

SCSS

$custom: #577bf3;
$custom-light: #95a0f8;
$custom-dark: #000000;

JSON

{
  "hex": "#577bf3",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 243
  },
  "hsl": {
    "h": 226.154,
    "s": 86.667,
    "l": 64.706
  },
  "oklch": {
    "l": 0.61864,
    "c": 0.18403,
    "h": 268.1
  },
  "luminance": 0.22663
}

Semantic roles & 50–950 ramp

primary

#577BF3

secondary

#EEE1B8

accent

#AF02E3

background

#F9F9FF

surface

#F2F2FF

border

#CCCCD7

text

#0F0E17

muted

#7E7E85

Preview Lab

Preview with #577BF3

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

Preview Lab → · Contrast checker → · Palette generator →