#577FDB#577FDB

#577FDB is a mid, vivid blue. Relative luminance 0.223; OKLCH L 61.1% C 0.147 H 264.7°. Best body text is #000000 at 5.46:1 contrast (WCAG AA passes).

Color values

HEX	#577FDB
RGB	rgb(87, 127, 219)
HSL	hsl(222, 65%, 60%)
HSV	hsv(222, 60%, 86%)
CMYK	cmyk(60.3%, 42%, 0%, 14.1%)
CIE-LAB	lab(54.36, 14.06, -51.33)
CIE-LCH	lch(54.36, 53.22, 285.32°)
OKLab	oklab(61.13% -0.0135 -0.1461)
OKLCH	oklch(61.13% 0.147 264.7)
XYZ	xyz(24.3016, 22.3174, 70.0311)
Luminance	0.2232 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FDB #DBB357

analogous

#57C1DB #577FDB #7157DB

triadic

#577FDB #DB577F #7FDB57

tetradic

#577FDB #DB57C1 #DBB357 #57DB71

square

#577FDB #DB57C1 #DBB357 #57DB71

split-complementary

#577FDB #DB7157 #C1DB57

monochromatic

#204497 #2B5BCA #577FDB #89A5E6 #BCCCF1

Accessibility & contrast

On white

3.84

#577FDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.46

#577FDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FDB

5.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FDB	#FFFFFF	#000000	##000000
##577FDB	1.00	3.84	5.46	5.46
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.46	21.00	1.00	1.00
##000000	5.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5688DF

Deuteranopia (green-blind)

#437CD9

Tritanopia (blue-blind)

#0094A2

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #577fdb;
/* rgb */ color: rgb(87, 127, 219);
/* oklch */ color: oklch(61.1% 0.147 264.7);

Tailwind

colors: {
  custom: {
    50: '#91a3e7',
    500: '#577fdb',
    950: '#000000',
  },
}

SCSS

$custom: #577fdb;
$custom-light: #91a3e7;
$custom-dark: #000000;

JSON

{
  "hex": "#577fdb",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 219
  },
  "hsl": {
    "h": 221.818,
    "s": 64.706,
    "l": 60
  },
  "oklch": {
    "l": 0.61133,
    "c": 0.14677,
    "h": 264.7
  },
  "luminance": 0.22319
}

Semantic roles & 50–950 ramp

primary

#577FDB

secondary

#E0D1AD

accent

#B540E8

background

#F9FAFE

surface

#F2F3FC

border

#CCCDD5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #577FDB

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

Preview Lab → · Contrast checker → · Palette generator →