#577BD9#577BD9

#577BD9 is a mid, vivid blue. Relative luminance 0.212; OKLCH L 60.2% C 0.149 H 266.3°. Best body text is #000000 at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#577BD9
RGB	rgb(87, 123, 217)
HSL	hsl(223, 63%, 60%)
HSV	hsv(223, 60%, 85%)
CMYK	cmyk(59.9%, 43.3%, 0%, 14.9%)
CIE-LAB	lab(53.17, 15.83, -52.10)
CIE-LCH	lch(53.17, 54.46, 286.90°)
OKLab	oklab(60.18% -0.0097 -0.1485)
OKLCH	oklch(60.18% 0.149 266.3)
XYZ	xyz(23.5336, 21.1999, 68.4840)
Luminance	0.2120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BD9 #D9B557

analogous

#57BCD9 #577BD9 #7457D9

triadic

#577BD9 #D9577B #7BD957

tetradic

#577BD9 #D957BC #D9B557 #57D974

square

#577BD9 #D957BC #D9B557 #57D974

split-complementary

#577BD9 #D97457 #BCD957

monochromatic

#214194 #2D57C6 #577BD9 #89A2E4 #BBC9F0

Accessibility & contrast

On white

4.01

#577BD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.24

#577BD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BD9

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BD9	#FFFFFF	#000000	##000000
##577BD9	1.00	4.01	5.24	5.24
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.24	21.00	1.00	1.00
##000000	5.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5085DD

Deuteranopia (green-blind)

#3D79D7

Tritanopia (blue-blind)

#00909F

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577bd9;
/* rgb */ color: rgb(87, 123, 217);
/* oklch */ color: oklch(60.2% 0.149 266.3);

Tailwind

colors: {
  custom: {
    50: '#91a0e5',
    500: '#577bd9',
    950: '#000000',
  },
}

SCSS

$custom: #577bd9;
$custom-light: #91a0e5;
$custom-dark: #000000;

JSON

{
  "hex": "#577bd9",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 217
  },
  "hsl": {
    "h": 223.385,
    "s": 63.107,
    "l": 59.608
  },
  "oklch": {
    "l": 0.60178,
    "c": 0.1488,
    "h": 266.3
  },
  "luminance": 0.21202
}

Semantic roles & 50–950 ramp

primary

#577BD9

secondary

#DFD1AD

accent

#B942E6

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577BD9

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

Preview Lab → · Contrast checker → · Palette generator →