#577EB8#577EB8

#577EB8 is a mid, moderate blue. Relative luminance 0.204; OKLCH L 58.9% C 0.100 H 258.1°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#577EB8
RGB	rgb(87, 126, 184)
HSL	hsl(216, 41%, 53%)
HSV	hsv(216, 53%, 72%)
CMYK	cmyk(52.7%, 31.5%, 0%, 27.8%)
CIE-LAB	lab(52.29, 3.22, -34.70)
CIE-LCH	lch(52.29, 34.85, 275.30°)
OKLab	oklab(58.95% -0.0205 -0.0976)
OKLCH	oklch(58.95% 0.1 258.1)
XYZ	xyz(20.0401, 20.4071, 48.2210)
Luminance	0.2041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EB8 #B89157

analogous

#57AFB8 #577EB8 #6057B8

triadic

#577EB8 #B8577E #7EB857

tetradic

#577EB8 #B857AF #B89157 #57B860

square

#577EB8 #B857AF #B89157 #57B860

split-complementary

#577EB8 #B86057 #AFB857

monochromatic

#2C4468 #3E6193 #577EB8 #829FCA #ADC0DC

Accessibility & contrast

On white

4.13

#577EB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.08

#577EB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EB8

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EB8	#FFFFFF	#000000	##000000
##577EB8	1.00	4.13	5.08	5.08
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.08	21.00	1.00	1.00
##000000	5.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6782BA

Deuteranopia (green-blind)

#5B79B7

Tritanopia (blue-blind)

#248B93

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577eb8;
/* rgb */ color: rgb(87, 126, 184);
/* oklch */ color: oklch(58.9% 0.100 258.1);

Tailwind

colors: {
  custom: {
    50: '#8ca3cd',
    500: '#577eb8',
    950: '#000000',
  },
}

SCSS

$custom: #577eb8;
$custom-light: #8ca3cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577eb8",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 184
  },
  "hsl": {
    "h": 215.876,
    "s": 40.586,
    "l": 53.137
  },
  "oklch": {
    "l": 0.58945,
    "c": 0.09975,
    "h": 258.1
  },
  "luminance": 0.20409
}

Semantic roles & 50–950 ramp

primary

#577EB8

secondary

#CAB9A0

accent

#A057D0

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577EB8

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

Preview Lab → · Contrast checker → · Palette generator →