#577BCF#577BCF

#577BCF is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.6% C 0.135 H 265.1°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#577BCF
RGB	rgb(87, 123, 207)
HSL	hsl(222, 56%, 58%)
HSV	hsv(222, 58%, 81%)
CMYK	cmyk(58%, 40.6%, 0%, 18.8%)
CIE-LAB	lab(52.61, 12.50, -47.33)
CIE-LCH	lch(52.61, 48.95, 284.80°)
OKLab	oklab(59.57% -0.0116 -0.1345)
OKLCH	oklch(59.57% 0.135 265.1)
XYZ	xyz(22.2721, 20.6953, 61.8403)
Luminance	0.2070 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BCF #CFAB57

analogous

#57B7CF #577BCF #6F57CF

triadic

#577BCF #CF577B #7BCF57

tetradic

#577BCF #CF57B7 #CFAB57 #57CF6F

square

#577BCF #CF57B7 #CFAB57 #57CF6F

split-complementary

#577BCF #CF6F57 #B7CF57

monochromatic

#264385 #345BB5 #577BCF #87A0DD #B6C6EA

Accessibility & contrast

On white

4.09

#577BCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#577BCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BCF

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BCF	#FFFFFF	#000000	##000000
##577BCF	1.00	4.09	5.14	5.14
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5783D2

Deuteranopia (green-blind)

#4778CD

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577bcf;
/* rgb */ color: rgb(87, 123, 207);
/* oklch */ color: oklch(59.6% 0.135 265.1);

Tailwind

colors: {
  custom: {
    50: '#8fa0de',
    500: '#577bcf',
    950: '#000000',
  },
}

SCSS

$custom: #577bcf;
$custom-light: #8fa0de;
$custom-dark: #000000;

JSON

{
  "hex": "#577bcf",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 207
  },
  "hsl": {
    "h": 222,
    "s": 55.556,
    "l": 57.647
  },
  "oklch": {
    "l": 0.59573,
    "c": 0.13497,
    "h": 265.1
  },
  "luminance": 0.20697
}

Semantic roles & 50–950 ramp

primary

#577BCF

secondary

#D9CBA9

accent

#B249DF

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BCF

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

Preview Lab → · Contrast checker → · Palette generator →