#577AAB#577AAB

#577AAB is a mid, moderate blue. Relative luminance 0.189; OKLCH L 57.4% C 0.086 H 256.9°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#577AAB
RGB	rgb(87, 122, 171)
HSL	hsl(215, 33%, 51%)
HSV	hsv(215, 49%, 67%)
CMYK	cmyk(49.1%, 28.7%, 0%, 32.9%)
CIE-LAB	lab(50.55, 1.53, -29.92)
CIE-LCH	lch(50.55, 29.96, 272.93°)
OKLab	oklab(57.39% -0.0195 -0.0838)
OKLCH	oklch(57.39% 0.086 256.9)
XYZ	xyz(18.2382, 18.8843, 41.2042)
Luminance	0.1889 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AAB #AB8857

analogous

#57A4AB #577AAB #5E57AB

triadic

#577AAB #AB577A #7AAB57

tetradic

#577AAB #AB57A4 #AB8857 #57AB5E

square

#577AAB #AB57A4 #AB8857 #57AB5E

split-complementary

#577AAB #AB5E57 #A4AB57

monochromatic

#2D405A #425D83 #577AAB #809ABF #A9BBD4

Accessibility & contrast

On white

4.40

#577AAB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#577AAB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AAB

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AAB	#FFFFFF	#000000	##000000
##577AAB	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677DAD

Deuteranopia (green-blind)

#5D75AA

Tritanopia (blue-blind)

#32858B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #577aab;
/* rgb */ color: rgb(87, 122, 171);
/* oklch */ color: oklch(57.4% 0.086 256.9);

Tailwind

colors: {
  custom: {
    50: '#8ba0c4',
    500: '#577aab',
    950: '#000000',
  },
}

SCSS

$custom: #577aab;
$custom-light: #8ba0c4;
$custom-dark: #000000;

JSON

{
  "hex": "#577aab",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 171
  },
  "hsl": {
    "h": 215,
    "s": 33.333,
    "l": 50.588
  },
  "oklch": {
    "l": 0.57387,
    "c": 0.08604,
    "h": 256.9
  },
  "luminance": 0.18886
}

Semantic roles & 50–950 ramp

primary

#577AAB

secondary

#C2B29C

accent

#9D5EC9

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E12

muted

#7D7E81

Preview Lab

Preview with #577AAB

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

Preview Lab → · Contrast checker → · Palette generator →