#577CD1#577CD1

#577CD1 is a mid, vivid blue. Relative luminance 0.210; OKLCH L 59.9% C 0.137 H 264.9°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#577CD1
RGB	rgb(87, 124, 209)
HSL	hsl(222, 57%, 58%)
HSV	hsv(222, 58%, 82%)
CMYK	cmyk(58.4%, 40.7%, 0%, 18%)
CIE-LAB	lab(53.00, 12.56, -47.85)
CIE-LCH	lch(53.00, 49.47, 284.70°)
OKLab	oklab(59.9% -0.0122 -0.136)
OKLCH	oklch(59.9% 0.137 264.9)
XYZ	xyz(22.6428, 21.0431, 63.1777)
Luminance	0.2104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CD1 #D1AC57

analogous

#57B9D1 #577CD1 #6F57D1

triadic

#577CD1 #D1577C #7CD157

tetradic

#577CD1 #D157B9 #D1AC57 #57D16F

square

#577CD1 #D157B9 #D1AC57 #57D16F

split-complementary

#577CD1 #D16F57 #B9D157

monochromatic

#254388 #325BB8 #577CD1 #87A1DE #B7C7EB

Accessibility & contrast

On white

4.03

#577CD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#577CD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CD1

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CD1	#FFFFFF	#000000	##000000
##577CD1	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5785D4

Deuteranopia (green-blind)

#4779CF

Tritanopia (blue-blind)

#008F9C

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577cd1;
/* rgb */ color: rgb(87, 124, 209);
/* oklch */ color: oklch(59.9% 0.137 264.9);

Tailwind

colors: {
  custom: {
    50: '#90a1df',
    500: '#577cd1',
    950: '#000000',
  },
}

SCSS

$custom: #577cd1;
$custom-light: #90a1df;
$custom-dark: #000000;

JSON

{
  "hex": "#577cd1",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 209
  },
  "hsl": {
    "h": 221.803,
    "s": 57.009,
    "l": 58.039
  },
  "oklch": {
    "l": 0.59903,
    "c": 0.13655,
    "h": 264.9
  },
  "luminance": 0.21045
}

Semantic roles & 50–950 ramp

primary

#577CD1

secondary

#DACBAA

accent

#B248E0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CD1

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

Preview Lab → · Contrast checker → · Palette generator →