#577FBF#577FBF

#577FBF is a mid, moderate blue. Relative luminance 0.210; OKLCH L 59.5% C 0.108 H 259.5°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#577FBF
RGB	rgb(87, 127, 191)
HSL	hsl(217, 45%, 55%)
HSV	hsv(217, 54%, 75%)
CMYK	cmyk(54.5%, 33.5%, 0%, 25.1%)
CIE-LAB	lab(52.91, 4.86, -37.74)
CIE-LCH	lch(52.91, 38.05, 277.34°)
OKLab	oklab(59.54% -0.0198 -0.1064)
OKLCH	oklch(59.54% 0.108 259.5)
XYZ	xyz(20.9206, 20.9649, 52.2243)
Luminance	0.2097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FBF #BF9757

analogous

#57B3BF #577FBF #6357BF

triadic

#577FBF #BF577F #7FBF57

tetradic

#577FBF #BF57B3 #BF9757 #57BF63

square

#577FBF #BF57B3 #BF9757 #57BF63

split-complementary

#577FBF #BF6357 #B3BF57

monochromatic

#2B4671 #3C619D #577FBF #83A1D0 #B0C3E1

Accessibility & contrast

On white

4.04

#577FBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#577FBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FBF

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FBF	#FFFFFF	#000000	##000000
##577FBF	1.00	4.04	5.19	5.19
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6584C2

Deuteranopia (green-blind)

#597ABE

Tritanopia (blue-blind)

#1A8D96

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577fbf;
/* rgb */ color: rgb(87, 127, 191);
/* oklch */ color: oklch(59.5% 0.108 259.5);

Tailwind

colors: {
  custom: {
    50: '#8da3d2',
    500: '#577fbf',
    950: '#000000',
  },
}

SCSS

$custom: #577fbf;
$custom-light: #8da3d2;
$custom-dark: #000000;

JSON

{
  "hex": "#577fbf",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 191
  },
  "hsl": {
    "h": 216.923,
    "s": 44.828,
    "l": 54.51
  },
  "oklch": {
    "l": 0.59536,
    "c": 0.10828,
    "h": 259.5
  },
  "luminance": 0.20967
}

Semantic roles & 50–950 ramp

primary

#577FBF

secondary

#CFBEA3

accent

#A353D5

background

#F9FAFC

surface

#F1F3F9

border

#CBCDD2

text

#0D0F14

muted

#7E7F82

Preview Lab

Preview with #577FBF

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

Preview Lab → · Contrast checker → · Palette generator →