#577CCF#577CCF

#577CCF is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.8% C 0.134 H 264.6°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#577CCF
RGB	rgb(87, 124, 207)
HSL	hsl(222, 56%, 58%)
HSV	hsv(222, 58%, 81%)
CMYK	cmyk(58%, 40.1%, 0%, 18.8%)
CIE-LAB	lab(52.89, 11.89, -46.89)
CIE-LCH	lch(52.89, 48.38, 284.23°)
OKLab	oklab(59.78% -0.0127 -0.1332)
OKLCH	oklch(59.78% 0.134 264.6)
XYZ	xyz(22.3968, 20.9447, 61.8819)
Luminance	0.2095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CCF #CFAA57

analogous

#57B8CF #577CCF #6E57CF

triadic

#577CCF #CF577C #7CCF57

tetradic

#577CCF #CF57B8 #CFAA57 #57CF6E

square

#577CCF #CF57B8 #CFAA57 #57CF6E

split-complementary

#577CCF #CF6E57 #B8CF57

monochromatic

#264485 #345CB5 #577CCF #87A1DD #B6C6EA

Accessibility & contrast

On white

4.05

#577CCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#577CCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CCF

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CCF	#FFFFFF	#000000	##000000
##577CCF	1.00	4.05	5.19	5.19
#FFFFFF	4.05	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)

#5984D2

Deuteranopia (green-blind)

#4979CD

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577ccf;
/* rgb */ color: rgb(87, 124, 207);
/* oklch */ color: oklch(59.8% 0.134 264.6);

Tailwind

colors: {
  custom: {
    50: '#8fa1de',
    500: '#577ccf',
    950: '#000000',
  },
}

SCSS

$custom: #577ccf;
$custom-light: #8fa1de;
$custom-dark: #000000;

JSON

{
  "hex": "#577ccf",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 207
  },
  "hsl": {
    "h": 221.5,
    "s": 55.556,
    "l": 57.647
  },
  "oklch": {
    "l": 0.59784,
    "c": 0.13378,
    "h": 264.6
  },
  "luminance": 0.20947
}

Semantic roles & 50–950 ramp

primary

#577CCF

secondary

#D9CAA9

accent

#B149DF

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CCF

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

Preview Lab → · Contrast checker → · Palette generator →