#577DCE#577DCE

#577DCE is a mid, vivid blue. Relative luminance 0.211; OKLCH L 59.9% C 0.131 H 263.9°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#577DCE
RGB	rgb(87, 125, 206)
HSL	hsl(221, 55%, 57%)
HSV	hsv(221, 58%, 81%)
CMYK	cmyk(57.8%, 39.3%, 0%, 19.2%)
CIE-LAB	lab(53.11, 10.96, -45.97)
CIE-LCH	lch(53.11, 47.26, 283.41°)
OKLab	oklab(59.94% -0.0139 -0.1305)
OKLCH	oklch(59.94% 0.131 263.9)
XYZ	xyz(22.4009, 21.1479, 61.2820)
Luminance	0.2115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DCE #CEA857

analogous

#57B9CE #577DCE #6C57CE

triadic

#577DCE #CE577D #7DCE57

tetradic

#577DCE #CE57B9 #CEA857 #57CE6C

square

#577DCE #CE57B9 #CEA857 #57CE6C

split-complementary

#577DCE #CE6C57 #B9CE57

monochromatic

#274484 #345DB3 #577DCE #86A2DC #B6C6EA

Accessibility & contrast

On white

4.02

#577DCE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#577DCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DCE

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DCE	#FFFFFF	#000000	##000000
##577DCE	1.00	4.02	5.23	5.23
#FFFFFF	4.02	1.00	21.00	21.00
#000000	5.23	21.00	1.00	1.00
##000000	5.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B85D1

Deuteranopia (green-blind)

#4B7ACC

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577dce;
/* rgb */ color: rgb(87, 125, 206);
/* oklch */ color: oklch(59.9% 0.131 263.9);

Tailwind

colors: {
  custom: {
    50: '#8fa2dd',
    500: '#577dce',
    950: '#000000',
  },
}

SCSS

$custom: #577dce;
$custom-light: #8fa2dd;
$custom-dark: #000000;

JSON

{
  "hex": "#577dce",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 206
  },
  "hsl": {
    "h": 220.84,
    "s": 54.839,
    "l": 57.451
  },
  "oklch": {
    "l": 0.59939,
    "c": 0.13122,
    "h": 263.9
  },
  "luminance": 0.2115
}

Semantic roles & 50–950 ramp

primary

#577DCE

secondary

#D8C9A8

accent

#AF4ADE

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577DCE

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

Preview Lab → · Contrast checker → · Palette generator →