#577BD5#577BD5

#577BD5 is a mid, vivid blue. Relative luminance 0.210; OKLCH L 59.9% C 0.143 H 265.8°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#577BD5
RGB	rgb(87, 123, 213)
HSL	hsl(223, 60%, 59%)
HSV	hsv(223, 59%, 84%)
CMYK	cmyk(59.2%, 42.3%, 0%, 16.5%)
CIE-LAB	lab(52.94, 14.50, -50.20)
CIE-LCH	lch(52.94, 52.25, 286.11°)
OKLab	oklab(59.93% -0.0104 -0.1429)
OKLCH	oklch(59.93% 0.143 265.8)
XYZ	xyz(23.0196, 20.9943, 65.7771)
Luminance	0.2100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BD5 #D5B157

analogous

#57BAD5 #577BD5 #7257D5

triadic

#577BD5 #D5577B #7BD557

tetradic

#577BD5 #D557BA #D5B157 #57D572

square

#577BD5 #D557BA #D5B157 #57D572

split-complementary

#577BD5 #D57257 #BAD557

monochromatic

#24428E #3059BF #577BD5 #88A1E1 #B9C8ED

Accessibility & contrast

On white

4.04

#577BD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#577BD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BD5

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BD5	#FFFFFF	#000000	##000000
##577BD5	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5385D8

Deuteranopia (green-blind)

#4279D3

Tritanopia (blue-blind)

#008F9E

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577bd5;
/* rgb */ color: rgb(87, 123, 213);
/* oklch */ color: oklch(59.9% 0.143 265.8);

Tailwind

colors: {
  custom: {
    50: '#90a0e2',
    500: '#577bd5',
    950: '#000000',
  },
}

SCSS

$custom: #577bd5;
$custom-light: #90a0e2;
$custom-dark: #000000;

JSON

{
  "hex": "#577bd5",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 213
  },
  "hsl": {
    "h": 222.857,
    "s": 60,
    "l": 58.824
  },
  "oklch": {
    "l": 0.59933,
    "c": 0.14328,
    "h": 265.8
  },
  "luminance": 0.20996
}

Semantic roles & 50–950 ramp

primary

#577BD5

secondary

#DDCFAB

accent

#B645E3

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #577BD5

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

Preview Lab → · Contrast checker → · Palette generator →