#577CEC#577CEC

#577CEC is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.6% C 0.173 H 267.4°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#577CEC
RGB	rgb(87, 124, 236)
HSL	hsl(225, 80%, 63%)
HSV	hsv(225, 63%, 93%)
CMYK	cmyk(63.1%, 47.5%, 0%, 7.5%)
CIE-LAB	lab(54.55, 21.62, -60.55)
CIE-LCH	lch(54.55, 64.29, 289.65°)
OKLab	oklab(61.59% -0.0078 -0.1733)
OKLCH	oklch(61.59% 0.173 267.4)
XYZ	xyz(26.2733, 22.4953, 82.2981)
Luminance	0.2250 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CEC #ECC757

analogous

#57C6EC #577CEC #7C57EC

triadic

#577CEC #EC577C #7CEC57

tetradic

#577CEC #EC57C6 #ECC757 #57EC7C

square

#577CEC #EC57C6 #ECC757 #57EC7C

split-complementary

#577CEC #EC7C57 #C6EC57

monochromatic

#143CB4 #2051E6 #577CEC #8EA7F2 #C5D2F8

Accessibility & contrast

On white

3.82

#577CEC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#577CEC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CEC

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CEC	#FFFFFF	#000000	##000000
##577CEC	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#428AF0

Deuteranopia (green-blind)

#247CEA

Tritanopia (blue-blind)

#0096A9

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #577cec;
/* rgb */ color: rgb(87, 124, 236);
/* oklch */ color: oklch(61.6% 0.173 267.4);

Tailwind

colors: {
  custom: {
    50: '#94a1f3',
    500: '#577cec',
    950: '#000000',
  },
}

SCSS

$custom: #577cec;
$custom-light: #94a1f3;
$custom-dark: #000000;

JSON

{
  "hex": "#577cec",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 236
  },
  "hsl": {
    "h": 225.101,
    "s": 79.679,
    "l": 63.333
  },
  "oklch": {
    "l": 0.61594,
    "c": 0.17346,
    "h": 267.4
  },
  "luminance": 0.22498
}

Semantic roles & 50–950 ramp

primary

#577CEC

secondary

#EADDB5

accent

#A80ADC

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577CEC

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

Preview Lab → · Contrast checker → · Palette generator →