#577BD3#577BD3

#577BD3 is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.8% C 0.141 H 265.6°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#577BD3
RGB	rgb(87, 123, 211)
HSL	hsl(223, 58%, 58%)
HSV	hsv(223, 59%, 83%)
CMYK	cmyk(58.8%, 41.7%, 0%, 17.3%)
CIE-LAB	lab(52.83, 13.83, -49.25)
CIE-LCH	lch(52.83, 51.15, 285.69°)
OKLab	oklab(59.81% -0.0108 -0.1401)
OKLCH	oklch(59.81% 0.141 265.6)
XYZ	xyz(22.7673, 20.8934, 64.4484)
Luminance	0.2089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BD3 #D3AF57

analogous

#57B9D3 #577BD3 #7157D3

triadic

#577BD3 #D3577B #7BD357

tetradic

#577BD3 #D357B9 #D3AF57 #57D371

square

#577BD3 #D357B9 #D3AF57 #57D371

split-complementary

#577BD3 #D37157 #B9D357

monochromatic

#24428B #3159BC #577BD3 #87A1E0 #B8C7EC

Accessibility & contrast

On white

4.05

#577BD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#577BD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BD3

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BD3	#FFFFFF	#000000	##000000
##577BD3	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5484D6

Deuteranopia (green-blind)

#4479D1

Tritanopia (blue-blind)

#008F9D

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577bd3;
/* rgb */ color: rgb(87, 123, 211);
/* oklch */ color: oklch(59.8% 0.141 265.6);

Tailwind

colors: {
  custom: {
    50: '#90a0e1',
    500: '#577bd3',
    950: '#000000',
  },
}

SCSS

$custom: #577bd3;
$custom-light: #90a0e1;
$custom-dark: #000000;

JSON

{
  "hex": "#577bd3",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 211
  },
  "hsl": {
    "h": 222.581,
    "s": 58.491,
    "l": 58.431
  },
  "oklch": {
    "l": 0.59812,
    "c": 0.14051,
    "h": 265.6
  },
  "luminance": 0.20895
}

Semantic roles & 50–950 ramp

primary

#577BD3

secondary

#DCCDAA

accent

#B546E2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BD3

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

Preview Lab → · Contrast checker → · Palette generator →