#577DBF#577DBF

#577DBF is a mid, moderate blue. Relative luminance 0.205; OKLCH L 59.1% C 0.110 H 260.9°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#577DBF
RGB	rgb(87, 125, 191)
HSL	hsl(218, 45%, 55%)
HSV	hsv(218, 54%, 75%)
CMYK	cmyk(54.5%, 34.6%, 0%, 25.1%)
CIE-LAB	lab(52.35, 6.06, -38.63)
CIE-LCH	lch(52.35, 39.10, 278.91°)
OKLab	oklab(59.1% -0.0175 -0.109)
OKLCH	oklch(59.1% 0.11 260.9)
XYZ	xyz(20.6649, 20.4535, 52.1391)
Luminance	0.2046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DBF #BF9957

analogous

#57B1BF #577DBF #6557BF

triadic

#577DBF #BF577D #7DBF57

tetradic

#577DBF #BF57B1 #BF9957 #57BF65

square

#577DBF #BF57B1 #BF9957 #57BF65

split-complementary

#577DBF #BF6557 #B1BF57

monochromatic

#2B4471 #3C5F9D #577DBF #839FD0 #B0C2E1

Accessibility & contrast

On white

4.12

#577DBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#577DBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DBF

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DBF	#FFFFFF	#000000	##000000
##577DBF	1.00	4.12	5.09	5.09
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6382C2

Deuteranopia (green-blind)

#5678BE

Tritanopia (blue-blind)

#1B8C95

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577dbf;
/* rgb */ color: rgb(87, 125, 191);
/* oklch */ color: oklch(59.1% 0.110 260.9);

Tailwind

colors: {
  custom: {
    50: '#8da2d2',
    500: '#577dbf',
    950: '#000000',
  },
}

SCSS

$custom: #577dbf;
$custom-light: #8da2d2;
$custom-dark: #000000;

JSON

{
  "hex": "#577dbf",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 191
  },
  "hsl": {
    "h": 218.077,
    "s": 44.828,
    "l": 54.51
  },
  "oklch": {
    "l": 0.59096,
    "c": 0.11044,
    "h": 260.9
  },
  "luminance": 0.20455
}

Semantic roles & 50–950 ramp

primary

#577DBF

secondary

#CFBFA3

accent

#A553D5

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0F14

muted

#7E7E82

Preview Lab

Preview with #577DBF

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

Preview Lab → · Contrast checker → · Palette generator →