#577FBA#577FBA

#577FBA is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.3% C 0.101 H 258.0°. Best body text is #000000 at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#577FBA
RGB	rgb(87, 127, 186)
HSL	hsl(216, 42%, 54%)
HSV	hsv(216, 53%, 73%)
CMYK	cmyk(53.2%, 31.7%, 0%, 27.1%)
CIE-LAB	lab(52.67, 3.26, -35.25)
CIE-LCH	lch(52.67, 35.40, 275.28°)
OKLab	oklab(59.27% -0.0212 -0.0992)
OKLCH	oklch(59.27% 0.101 258)
XYZ	xyz(20.3797, 20.7486, 49.3758)
Luminance	0.2075 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FBA #BA9257

analogous

#57B0BA #577FBA #6057BA

triadic

#577FBA #BA577F #7FBA57

tetradic

#577FBA #BA57B0 #BA9257 #57BA60

square

#577FBA #BA57B0 #BA9257 #57BA60

split-complementary

#577FBA #BA6057 #B0BA57

monochromatic

#2C456B #3E6196 #577FBA #82A0CC #AEC1DE

Accessibility & contrast

On white

4.08

#577FBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.15

#577FBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FBA

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FBA	#FFFFFF	#000000	##000000
##577FBA	1.00	4.08	5.15	5.15
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.15	21.00	1.00	1.00
##000000	5.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6883BD

Deuteranopia (green-blind)

#5B79B9

Tritanopia (blue-blind)

#218C94

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577fba;
/* rgb */ color: rgb(87, 127, 186);
/* oklch */ color: oklch(59.3% 0.101 258.0);

Tailwind

colors: {
  custom: {
    50: '#8da3cf',
    500: '#577fba',
    950: '#000000',
  },
}

SCSS

$custom: #577fba;
$custom-light: #8da3cf;
$custom-dark: #000000;

JSON

{
  "hex": "#577fba",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 186
  },
  "hsl": {
    "h": 215.758,
    "s": 41.772,
    "l": 53.529
  },
  "oklch": {
    "l": 0.59272,
    "c": 0.10144,
    "h": 258
  },
  "luminance": 0.2075
}

Semantic roles & 50–950 ramp

primary

#577FBA

secondary

#CCBAA1

accent

#A056D2

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F14

muted

#7D7F82

Preview Lab

Preview with #577FBA

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

Preview Lab → · Contrast checker → · Palette generator →