#577FD1#577FD1

#577FD1 is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.5% C 0.133 H 263.3°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#577FD1
RGB	rgb(87, 127, 209)
HSL	hsl(220, 57%, 58%)
HSV	hsv(220, 58%, 82%)
CMYK	cmyk(58.4%, 39.2%, 0%, 18%)
CIE-LAB	lab(53.82, 10.74, -46.54)
CIE-LCH	lch(53.82, 47.77, 282.99°)
OKLab	oklab(60.54% -0.0155 -0.1321)
OKLCH	oklch(60.54% 0.133 263.3)
XYZ	xyz(23.0245, 21.8065, 63.3050)
Luminance	0.2181 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FD1 #D1A957

analogous

#57BCD1 #577FD1 #6C57D1

triadic

#577FD1 #D1577F #7FD157

tetradic

#577FD1 #D157BC #D1A957 #57D16C

square

#577FD1 #D157BC #D1A957 #57D16C

split-complementary

#577FD1 #D16C57 #BCD157

monochromatic

#254688 #325EB8 #577FD1 #87A4DE #B7C8EB

Accessibility & contrast

On white

3.92

#577FD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#577FD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FD1

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FD1	#FFFFFF	#000000	##000000
##577FD1	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C87D4

Deuteranopia (green-blind)

#4C7BCF

Tritanopia (blue-blind)

#00919E

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577fd1;
/* rgb */ color: rgb(87, 127, 209);
/* oklch */ color: oklch(60.5% 0.133 263.3);

Tailwind

colors: {
  custom: {
    50: '#90a3df',
    500: '#577fd1',
    950: '#000000',
  },
}

SCSS

$custom: #577fd1;
$custom-light: #90a3df;
$custom-dark: #000000;

JSON

{
  "hex": "#577fd1",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 209
  },
  "hsl": {
    "h": 220.328,
    "s": 57.009,
    "l": 58.039
  },
  "oklch": {
    "l": 0.60539,
    "c": 0.13304,
    "h": 263.3
  },
  "luminance": 0.21808
}

Semantic roles & 50–950 ramp

primary

#577FD1

secondary

#DACAAA

accent

#AE48E0

background

#F9FAFD

surface

#F2F3FB

border

#CCCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #577FD1

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

Preview Lab → · Contrast checker → · Palette generator →