#577FD5#577FD5

#577FD5 is a mid, vivid blue. Relative luminance 0.220; OKLCH L 60.8% C 0.139 H 263.9°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#577FD5
RGB	rgb(87, 127, 213)
HSL	hsl(221, 60%, 59%)
HSV	hsv(221, 59%, 84%)
CMYK	cmyk(59.2%, 40.4%, 0%, 16.5%)
CIE-LAB	lab(54.03, 12.06, -48.47)
CIE-LCH	lch(54.03, 49.94, 283.98°)
OKLab	oklab(60.77% -0.0146 -0.1378)
OKLCH	oklch(60.77% 0.139 263.9)
XYZ	xyz(23.5260, 22.0071, 65.9459)
Luminance	0.2201 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FD5 #D5AD57

analogous

#57BED5 #577FD5 #6E57D5

triadic

#577FD5 #D5577F #7FD557

tetradic

#577FD5 #D557BE #D5AD57 #57D56E

square

#577FD5 #D557BE #D5AD57 #57D56E

split-complementary

#577FD5 #D56E57 #BED557

monochromatic

#24458E #305DBF #577FD5 #88A4E1 #B9CAED

Accessibility & contrast

On white

3.89

#577FD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#577FD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FD5

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FD5	#FFFFFF	#000000	##000000
##577FD5	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A87D8

Deuteranopia (green-blind)

#497CD3

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577fd5;
/* rgb */ color: rgb(87, 127, 213);
/* oklch */ color: oklch(60.8% 0.139 263.9);

Tailwind

colors: {
  custom: {
    50: '#90a3e2',
    500: '#577fd5',
    950: '#000000',
  },
}

SCSS

$custom: #577fd5;
$custom-light: #90a3e2;
$custom-dark: #000000;

JSON

{
  "hex": "#577fd5",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 213
  },
  "hsl": {
    "h": 220.952,
    "s": 60,
    "l": 58.824
  },
  "oklch": {
    "l": 0.60774,
    "c": 0.13854,
    "h": 263.9
  },
  "luminance": 0.22009
}

Semantic roles & 50–950 ramp

primary

#577FD5

secondary

#DDCDAB

accent

#B145E3

background

#F9FAFD

surface

#F2F3FB

border

#CCCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #577FD5

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

Preview Lab → · Contrast checker → · Palette generator →