#577CCE#577CCE

#577CCE is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.7% C 0.132 H 264.4°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#577CCE
RGB	rgb(87, 124, 206)
HSL	hsl(221, 55%, 57%)
HSV	hsv(221, 58%, 81%)
CMYK	cmyk(57.8%, 39.8%, 0%, 19.2%)
CIE-LAB	lab(52.84, 11.56, -46.41)
CIE-LCH	lch(52.84, 47.83, 283.99°)
OKLab	oklab(59.73% -0.0129 -0.1318)
OKLCH	oklch(59.73% 0.132 264.4)
XYZ	xyz(22.2749, 20.8960, 61.2400)
Luminance	0.2090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CCE #CEA957

analogous

#57B7CE #577CCE #6E57CE

triadic

#577CCE #CE577C #7CCE57

tetradic

#577CCE #CE57B7 #CEA957 #57CE6E

square

#577CCE #CE57B7 #CEA957 #57CE6E

split-complementary

#577CCE #CE6E57 #B7CE57

monochromatic

#274484 #345CB3 #577CCE #86A1DC #B6C6EA

Accessibility & contrast

On white

4.05

#577CCE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#577CCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CCE

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CCE	#FFFFFF	#000000	##000000
##577CCE	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5984D1

Deuteranopia (green-blind)

#4A79CC

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577cce;
/* rgb */ color: rgb(87, 124, 206);
/* oklch */ color: oklch(59.7% 0.132 264.4);

Tailwind

colors: {
  custom: {
    50: '#8fa1dd',
    500: '#577cce',
    950: '#000000',
  },
}

SCSS

$custom: #577cce;
$custom-light: #8fa1dd;
$custom-dark: #000000;

JSON

{
  "hex": "#577cce",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 206
  },
  "hsl": {
    "h": 221.345,
    "s": 54.839,
    "l": 57.451
  },
  "oklch": {
    "l": 0.59726,
    "c": 0.1324,
    "h": 264.4
  },
  "luminance": 0.20898
}

Semantic roles & 50–950 ramp

primary

#577CCE

secondary

#D8C9A8

accent

#B04ADE

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CCE

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

Preview Lab → · Contrast checker → · Palette generator →