#577FB7#577FB7

#577FB7 is a mid, moderate blue. Relative luminance 0.206; OKLCH L 59.1% C 0.097 H 256.9°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#577FB7
RGB	rgb(87, 127, 183)
HSL	hsl(215, 40%, 53%)
HSV	hsv(215, 52%, 72%)
CMYK	cmyk(52.5%, 30.6%, 0%, 28.2%)
CIE-LAB	lab(52.53, 2.31, -33.75)
CIE-LCH	lch(52.53, 33.83, 273.91°)
OKLab	oklab(59.12% -0.022 -0.0949)
OKLCH	oklch(59.12% 0.097 256.9)
XYZ	xyz(20.0642, 20.6224, 47.7138)
Luminance	0.2062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FB7 #B78F57

analogous

#57AFB7 #577FB7 #5F57B7

triadic

#577FB7 #B7577F #7FB757

tetradic

#577FB7 #B757AF #B78F57 #57B75F

square

#577FB7 #B757AF #B78F57 #57B75F

split-complementary

#577FB7 #B75F57 #AFB757

monochromatic

#2C4567 #3F6192 #577FB7 #82A0C9 #ADC0DC

Accessibility & contrast

On white

4.10

#577FB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#577FB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FB7

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FB7	#FFFFFF	#000000	##000000
##577FB7	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6982B9

Deuteranopia (green-blind)

#5D79B6

Tritanopia (blue-blind)

#258B93

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577fb7;
/* rgb */ color: rgb(87, 127, 183);
/* oklch */ color: oklch(59.1% 0.097 256.9);

Tailwind

colors: {
  custom: {
    50: '#8ca3cd',
    500: '#577fb7',
    950: '#000000',
  },
}

SCSS

$custom: #577fb7;
$custom-light: #8ca3cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577fb7",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 183
  },
  "hsl": {
    "h": 215,
    "s": 40,
    "l": 52.941
  },
  "oklch": {
    "l": 0.59117,
    "c": 0.09738,
    "h": 256.9
  },
  "luminance": 0.20624
}

Semantic roles & 50–950 ramp

primary

#577FB7

secondary

#CAB8A0

accent

#9E58D0

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577FB7

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

Preview Lab → · Contrast checker → · Palette generator →