#577FD3#577FD3

#577FD3 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.7% C 0.136 H 263.6°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#577FD3
RGB	rgb(87, 127, 211)
HSL	hsl(221, 58%, 58%)
HSV	hsv(221, 59%, 83%)
CMYK	cmyk(58.8%, 39.8%, 0%, 17.3%)
CIE-LAB	lab(53.93, 11.40, -47.51)
CIE-LCH	lch(53.93, 48.85, 283.49°)
OKLab	oklab(60.66% -0.0151 -0.1349)
OKLCH	oklch(60.66% 0.136 263.6)
XYZ	xyz(23.2737, 21.9062, 64.6172)
Luminance	0.2191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FD3 #D3AB57

analogous

#57BDD3 #577FD3 #6D57D3

triadic

#577FD3 #D3577F #7FD357

tetradic

#577FD3 #D357BD #D3AB57 #57D36D

square

#577FD3 #D357BD #D3AB57 #57D36D

split-complementary

#577FD3 #D36D57 #BDD357

monochromatic

#24468B #315EBC #577FD3 #87A4E0 #B8C9EC

Accessibility & contrast

On white

3.90

#577FD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#577FD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FD3

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FD3	#FFFFFF	#000000	##000000
##577FD3	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B87D6

Deuteranopia (green-blind)

#4A7CD1

Tritanopia (blue-blind)

#00929F

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577fd3;
/* rgb */ color: rgb(87, 127, 211);
/* oklch */ color: oklch(60.7% 0.136 263.6);

Tailwind

colors: {
  custom: {
    50: '#90a3e1',
    500: '#577fd3',
    950: '#000000',
  },
}

SCSS

$custom: #577fd3;
$custom-light: #90a3e1;
$custom-dark: #000000;

JSON

{
  "hex": "#577fd3",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 211
  },
  "hsl": {
    "h": 220.645,
    "s": 58.491,
    "l": 58.431
  },
  "oklch": {
    "l": 0.60656,
    "c": 0.13579,
    "h": 263.6
  },
  "luminance": 0.21908
}

Semantic roles & 50–950 ramp

primary

#577FD3

secondary

#DCCCAA

accent

#B046E2

background

#F9FAFD

surface

#F2F3FB

border

#CCCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #577FD3

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

Preview Lab → · Contrast checker → · Palette generator →