#577BD1#577BD1

#577BD1 is a mid, vivid blue. Relative luminance 0.208; OKLCH L 59.7% C 0.138 H 265.3°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#577BD1
RGB	rgb(87, 123, 209)
HSL	hsl(222, 57%, 58%)
HSV	hsv(222, 58%, 82%)
CMYK	cmyk(58.4%, 41.1%, 0%, 18%)
CIE-LAB	lab(52.72, 13.17, -48.29)
CIE-LCH	lch(52.72, 50.05, 285.25°)
OKLab	oklab(59.69% -0.0112 -0.1373)
OKLCH	oklch(59.69% 0.138 265.3)
XYZ	xyz(22.5181, 20.7938, 63.1362)
Luminance	0.2080 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BD1 #D1AD57

analogous

#57B8D1 #577BD1 #7057D1

triadic

#577BD1 #D1577B #7BD157

tetradic

#577BD1 #D157B8 #D1AD57 #57D170

square

#577BD1 #D157B8 #D1AD57 #57D170

split-complementary

#577BD1 #D17057 #B8D157

monochromatic

#254388 #325AB8 #577BD1 #87A1DE #B7C6EB

Accessibility & contrast

On white

4.07

#577BD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#577BD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BD1

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BD1	#FFFFFF	#000000	##000000
##577BD1	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5684D4

Deuteranopia (green-blind)

#4579CF

Tritanopia (blue-blind)

#008E9C

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577bd1;
/* rgb */ color: rgb(87, 123, 209);
/* oklch */ color: oklch(59.7% 0.138 265.3);

Tailwind

colors: {
  custom: {
    50: '#90a0df',
    500: '#577bd1',
    950: '#000000',
  },
}

SCSS

$custom: #577bd1;
$custom-light: #90a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#577bd1",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 209
  },
  "hsl": {
    "h": 222.295,
    "s": 57.009,
    "l": 58.039
  },
  "oklch": {
    "l": 0.59692,
    "c": 0.13774,
    "h": 265.3
  },
  "luminance": 0.20796
}

Semantic roles & 50–950 ramp

primary

#577BD1

secondary

#DACCAA

accent

#B348E0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BD1

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

Preview Lab → · Contrast checker → · Palette generator →