#577DD1#577DD1

#577DD1 is a mid, vivid blue. Relative luminance 0.213; OKLCH L 60.1% C 0.135 H 264.3°. Best body text is #000000 at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#577DD1
RGB	rgb(87, 125, 209)
HSL	hsl(221, 57%, 58%)
HSV	hsv(221, 58%, 82%)
CMYK	cmyk(58.4%, 40.2%, 0%, 18%)
CIE-LAB	lab(53.27, 11.95, -47.42)
CIE-LCH	lch(53.27, 48.90, 284.14°)
OKLab	oklab(60.11% -0.0133 -0.1347)
OKLCH	oklch(60.11% 0.135 264.3)
XYZ	xyz(22.7688, 21.2950, 63.2197)
Luminance	0.2130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DD1 #D1AB57

analogous

#57BAD1 #577DD1 #6E57D1

triadic

#577DD1 #D1577D #7DD157

tetradic

#577DD1 #D157BA #D1AB57 #57D16E

square

#577DD1 #D157BA #D1AB57 #57D16E

split-complementary

#577DD1 #D16E57 #BAD157

monochromatic

#254488 #325CB8 #577DD1 #87A2DE #B7C7EB

Accessibility & contrast

On white

3.99

#577DD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.26

#577DD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DD1

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DD1	#FFFFFF	#000000	##000000
##577DD1	1.00	3.99	5.26	5.26
#FFFFFF	3.99	1.00	21.00	21.00
#000000	5.26	21.00	1.00	1.00
##000000	5.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5985D4

Deuteranopia (green-blind)

#497ACF

Tritanopia (blue-blind)

#00909D

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577dd1;
/* rgb */ color: rgb(87, 125, 209);
/* oklch */ color: oklch(60.1% 0.135 264.3);

Tailwind

colors: {
  custom: {
    50: '#90a2df',
    500: '#577dd1',
    950: '#000000',
  },
}

SCSS

$custom: #577dd1;
$custom-light: #90a2df;
$custom-dark: #000000;

JSON

{
  "hex": "#577dd1",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 209
  },
  "hsl": {
    "h": 221.311,
    "s": 57.009,
    "l": 58.039
  },
  "oklch": {
    "l": 0.60114,
    "c": 0.13538,
    "h": 264.3
  },
  "luminance": 0.21297
}

Semantic roles & 50–950 ramp

primary

#577DD1

secondary

#DACBAA

accent

#B148E0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577DD1

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

Preview Lab → · Contrast checker → · Palette generator →