#577EC9#577EC9

#577EC9 is a mid, vivid blue. Relative luminance 0.212; OKLCH L 59.9% C 0.123 H 262.5°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#577EC9
RGB	rgb(87, 126, 201)
HSL	hsl(219, 51%, 56%)
HSV	hsv(219, 57%, 79%)
CMYK	cmyk(56.7%, 37.3%, 0%, 21.2%)
CIE-LAB	lab(53.13, 8.71, -43.10)
CIE-LCH	lch(53.13, 43.98, 281.42°)
OKLab	oklab(59.87% -0.0162 -0.1221)
OKLCH	oklch(59.87% 0.123 262.5)
XYZ	xyz(21.9303, 21.1632, 58.1763)
Luminance	0.2117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EC9 #C9A257

analogous

#57B7C9 #577EC9 #6957C9

triadic

#577EC9 #C9577E #7EC957

tetradic

#577EC9 #C957B7 #C9A257 #57C969

square

#577EC9 #C957B7 #C9A257 #57C969

split-complementary

#577EC9 #C96957 #B7C957

monochromatic

#28457D #375FAC #577EC9 #85A2D8 #B4C5E7

Accessibility & contrast

On white

4.01

#577EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#577EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EC9

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EC9	#FFFFFF	#000000	##000000
##577EC9	1.00	4.01	5.23	5.23
#FFFFFF	4.01	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)

#5F85CC

Deuteranopia (green-blind)

#517AC7

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577ec9;
/* rgb */ color: rgb(87, 126, 201);
/* oklch */ color: oklch(59.9% 0.123 262.5);

Tailwind

colors: {
  custom: {
    50: '#8fa3da',
    500: '#577ec9',
    950: '#000000',
  },
}

SCSS

$custom: #577ec9;
$custom-light: #8fa3da;
$custom-dark: #000000;

JSON

{
  "hex": "#577ec9",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 201
  },
  "hsl": {
    "h": 219.474,
    "s": 51.351,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59867,
    "c": 0.12316,
    "h": 262.5
  },
  "luminance": 0.21165
}

Semantic roles & 50–950 ramp

primary

#577EC9

secondary

#D5C5A7

accent

#AA4DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577EC9

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

Preview Lab → · Contrast checker → · Palette generator →