#577DDD#577DDD

#577DDD is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.8% C 0.152 H 265.8°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#577DDD
RGB	rgb(87, 125, 221)
HSL	hsl(223, 66%, 60%)
HSV	hsv(223, 61%, 87%)
CMYK	cmyk(60.6%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(53.93, 15.95, -53.13)
CIE-LCH	lch(53.93, 55.48, 286.71°)
OKLab	oklab(60.84% -0.0111 -0.1515)
OKLCH	oklch(60.84% 0.152 265.8)
XYZ	xyz(24.3108, 21.9118, 71.3409)
Luminance	0.2191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DDD #DDB757

analogous

#57C0DD #577DDD #7457DD

triadic

#577DDD #DD577D #7DDD57

tetradic

#577DDD #DD57C0 #DDB757 #57DD74

square

#577DDD #DD57C0 #DDB757 #57DD74

split-complementary

#577DDD #DD7457 #C0DD57

monochromatic

#1F429A #2A58CD #577DDD #8AA4E7 #BDCCF2

Accessibility & contrast

On white

3.90

#577DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#577DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DDD

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DDD	#FFFFFF	#000000	##000000
##577DDD	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)

#5187E1

Deuteranopia (green-blind)

#3D7BDB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577ddd;
/* rgb */ color: rgb(87, 125, 221);
/* oklch */ color: oklch(60.8% 0.152 265.8);

Tailwind

colors: {
  custom: {
    50: '#91a2e8',
    500: '#577ddd',
    950: '#000000',
  },
}

SCSS

$custom: #577ddd;
$custom-light: #91a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#577ddd",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 222.985,
    "s": 66.337,
    "l": 60.392
  },
  "oklch": {
    "l": 0.60839,
    "c": 0.15188,
    "h": 265.8
  },
  "luminance": 0.21914
}

Semantic roles & 50–950 ramp

primary

#577DDD

secondary

#E1D3AE

accent

#9A17CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F16

muted

#7E7E84

Preview Lab

Preview with #577DDD

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

Preview Lab → · Contrast checker → · Palette generator →