#577EB7#577EB7

#577EB7 is a mid, moderate blue. Relative luminance 0.204; OKLCH L 58.9% C 0.098 H 257.8°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#577EB7
RGB	rgb(87, 126, 183)
HSL	hsl(216, 40%, 53%)
HSV	hsv(216, 52%, 72%)
CMYK	cmyk(52.5%, 31.1%, 0%, 28.2%)
CIE-LAB	lab(52.25, 2.90, -34.20)
CIE-LCH	lch(52.25, 34.32, 274.85°)
OKLab	oklab(58.89% -0.0208 -0.0962)
OKLCH	oklch(58.89% 0.098 257.8)
XYZ	xyz(19.9357, 20.3654, 47.6709)
Luminance	0.2037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EB7 #B79057

analogous

#57AEB7 #577EB7 #6057B7

triadic

#577EB7 #B7577E #7EB757

tetradic

#577EB7 #B757AE #B79057 #57B760

square

#577EB7 #B757AE #B79057 #57B760

split-complementary

#577EB7 #B76057 #AEB757

monochromatic

#2C4467 #3F6192 #577EB7 #829FC9 #ADC0DC

Accessibility & contrast

On white

4.14

#577EB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#577EB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EB7

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EB7	#FFFFFF	#000000	##000000
##577EB7	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6882B9

Deuteranopia (green-blind)

#5C78B6

Tritanopia (blue-blind)

#268B92

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577eb7;
/* rgb */ color: rgb(87, 126, 183);
/* oklch */ color: oklch(58.9% 0.098 257.8);

Tailwind

colors: {
  custom: {
    50: '#8ca3cd',
    500: '#577eb7',
    950: '#000000',
  },
}

SCSS

$custom: #577eb7;
$custom-light: #8ca3cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577eb7",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 183
  },
  "hsl": {
    "h": 215.625,
    "s": 40,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58894,
    "c": 0.09839,
    "h": 257.8
  },
  "luminance": 0.20367
}

Semantic roles & 50–950 ramp

primary

#577EB7

secondary

#CAB9A0

accent

#9F58D0

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577EB7

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

Preview Lab → · Contrast checker → · Palette generator →