#577ACB#577ACB

#577ACB is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.1% C 0.131 H 265.0°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#577ACB
RGB	rgb(87, 122, 203)
HSL	hsl(222, 53%, 57%)
HSV	hsv(222, 57%, 80%)
CMYK	cmyk(57.1%, 39.9%, 0%, 20.4%)
CIE-LAB	lab(52.12, 11.79, -45.83)
CIE-LCH	lch(52.12, 47.32, 284.43°)
OKLab	oklab(59.13% -0.0113 -0.1301)
OKLCH	oklch(59.13% 0.131 265)
XYZ	xyz(21.6658, 20.2554, 59.2563)
Luminance	0.2026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577ACB #CBA857

analogous

#57B4CB #577ACB #6E57CB

triadic

#577ACB #CB577A #7ACB57

tetradic

#577ACB #CB57B4 #CBA857 #57CB6E

square

#577ACB #CB57B4 #CBA857 #57CB6E

split-complementary

#577ACB #CB6E57 #B4CB57

monochromatic

#284280 #365AAF #577ACB #869FD9 #B4C4E8

Accessibility & contrast

On white

4.16

#577ACB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#577ACB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577ACB

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577ACB	#FFFFFF	#000000	##000000
##577ACB	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5882CE

Deuteranopia (green-blind)

#4977C9

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577acb;
/* rgb */ color: rgb(87, 122, 203);
/* oklch */ color: oklch(59.1% 0.131 265.0);

Tailwind

colors: {
  custom: {
    50: '#8fa0db',
    500: '#577acb',
    950: '#000000',
  },
}

SCSS

$custom: #577acb;
$custom-light: #8fa0db;
$custom-dark: #000000;

JSON

{
  "hex": "#577acb",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 203
  },
  "hsl": {
    "h": 221.897,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.59125,
    "c": 0.13059,
    "h": 265
  },
  "luminance": 0.20257
}

Semantic roles & 50–950 ramp

primary

#577ACB

secondary

#D7C8A7

accent

#B14CDC

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577ACB

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

Preview Lab → · Contrast checker → · Palette generator →