#577CB2#577CB2

#577CB2 is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.2% C 0.094 H 257.7°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#577CB2
RGB	rgb(87, 124, 178)
HSL	hsl(216, 37%, 52%)
HSV	hsv(216, 51%, 70%)
CMYK	cmyk(51.1%, 30.3%, 0%, 30.2%)
CIE-LAB	lab(51.44, 2.52, -32.58)
CIE-LCH	lch(51.44, 32.67, 274.43°)
OKLab	oklab(58.19% -0.0199 -0.0915)
OKLCH	oklch(58.19% 0.094 257.7)
XYZ	xyz(19.1713, 19.6545, 44.8943)
Luminance	0.1966 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB2 #B28D57

analogous

#57AAB2 #577CB2 #5F57B2

triadic

#577CB2 #B2577C #7CB257

tetradic

#577CB2 #B257AA #B28D57 #57B25F

square

#577CB2 #B257AA #B28D57 #57B25F

split-complementary

#577CB2 #B25F57 #AAB257

monochromatic

#2D4262 #405F8C #577CB2 #819DC5 #ABBDD8

Accessibility & contrast

On white

4.26

#577CB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#577CB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB2

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB2	#FFFFFF	#000000	##000000
##577CB2	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677FB4

Deuteranopia (green-blind)

#5C77B1

Tritanopia (blue-blind)

#2B888F

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb2;
/* rgb */ color: rgb(87, 124, 178);
/* oklch */ color: oklch(58.2% 0.094 257.7);

Tailwind

colors: {
  custom: {
    50: '#8ca1c9',
    500: '#577cb2',
    950: '#000000',
  },
}

SCSS

$custom: #577cb2;
$custom-light: #8ca1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb2",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 178
  },
  "hsl": {
    "h": 215.604,
    "s": 37.143,
    "l": 51.961
  },
  "oklch": {
    "l": 0.5819,
    "c": 0.0936,
    "h": 257.7
  },
  "luminance": 0.19656
}

Semantic roles & 50–950 ramp

primary

#577CB2

secondary

#C6B69E

accent

#9F5BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB2

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

Preview Lab → · Contrast checker → · Palette generator →