#577AB3#577AB3

#577AB3 is a mid, moderate blue. Relative luminance 0.192; OKLCH L 57.8% C 0.097 H 259.8°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#577AB3
RGB	rgb(87, 122, 179)
HSL	hsl(217, 38%, 52%)
HSV	hsv(217, 51%, 70%)
CMYK	cmyk(51.4%, 31.8%, 0%, 29.8%)
CIE-LAB	lab(50.92, 4.03, -33.97)
CIE-LCH	lch(50.92, 34.21, 276.77°)
OKLab	oklab(57.79% -0.0171 -0.0955)
OKLCH	oklch(57.79% 0.097 259.8)
XYZ	xyz(19.0240, 19.1986, 45.3423)
Luminance	0.1920 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AB3 #B39057

analogous

#57A8B3 #577AB3 #6257B3

triadic

#577AB3 #B3577A #7AB357

tetradic

#577AB3 #B357A8 #B39057 #57B362

square

#577AB3 #B357A8 #B39057 #57B362

split-complementary

#577AB3 #B36257 #A8B357

monochromatic

#2D4163 #405D8D #577AB3 #819BC6 #ABBDD9

Accessibility & contrast

On white

4.34

#577AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#577AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AB3

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AB3	#FFFFFF	#000000	##000000
##577AB3	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647EB5

Deuteranopia (green-blind)

#5975B2

Tritanopia (blue-blind)

#2B868E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #577ab3;
/* rgb */ color: rgb(87, 122, 179);
/* oklch */ color: oklch(57.8% 0.097 259.8);

Tailwind

colors: {
  custom: {
    50: '#8ca0ca',
    500: '#577ab3',
    950: '#000000',
  },
}

SCSS

$custom: #577ab3;
$custom-light: #8ca0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577ab3",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 179
  },
  "hsl": {
    "h": 217.174,
    "s": 37.705,
    "l": 52.157
  },
  "oklch": {
    "l": 0.57795,
    "c": 0.09706,
    "h": 259.8
  },
  "luminance": 0.192
}

Semantic roles & 50–950 ramp

primary

#577AB3

secondary

#C7B89F

accent

#A25ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577AB3

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

Preview Lab → · Contrast checker → · Palette generator →