#577AD1#577AD1

#577AD1 is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.5% C 0.139 H 265.8°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#577AD1
RGB	rgb(87, 122, 209)
HSL	hsl(223, 57%, 58%)
HSV	hsv(223, 58%, 82%)
CMYK	cmyk(58.4%, 41.6%, 0%, 18%)
CIE-LAB	lab(52.45, 13.78, -48.72)
CIE-LCH	lch(52.45, 50.63, 285.79°)
OKLab	oklab(59.48% -0.0101 -0.1386)
OKLCH	oklch(59.48% 0.139 265.8)
XYZ	xyz(22.3947, 20.5469, 63.0950)
Luminance	0.2055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AD1 #D1AE57

analogous

#57B7D1 #577AD1 #7157D1

triadic

#577AD1 #D1577A #7AD157

tetradic

#577AD1 #D157B7 #D1AE57 #57D171

square

#577AD1 #D157B7 #D1AE57 #57D171

split-complementary

#577AD1 #D17157 #B7D157

monochromatic

#254288 #3259B8 #577AD1 #87A0DE #B7C6EB

Accessibility & contrast

On white

4.11

#577AD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#577AD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AD1

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AD1	#FFFFFF	#000000	##000000
##577AD1	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5483D4

Deuteranopia (green-blind)

#4478CF

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577ad1;
/* rgb */ color: rgb(87, 122, 209);
/* oklch */ color: oklch(59.5% 0.139 265.8);

Tailwind

colors: {
  custom: {
    50: '#90a0df',
    500: '#577ad1',
    950: '#000000',
  },
}

SCSS

$custom: #577ad1;
$custom-light: #90a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#577ad1",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 209
  },
  "hsl": {
    "h": 222.787,
    "s": 57.009,
    "l": 58.039
  },
  "oklch": {
    "l": 0.59481,
    "c": 0.13894,
    "h": 265.8
  },
  "luminance": 0.20549
}

Semantic roles & 50–950 ramp

primary

#577AD1

secondary

#DACCAA

accent

#B448E0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577AD1

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

Preview Lab → · Contrast checker → · Palette generator →