#577FCB#577FCB

#577FCB is a mid, vivid blue. Relative luminance 0.215; OKLCH L 60.2% C 0.125 H 262.3°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#577FCB
RGB	rgb(87, 127, 203)
HSL	hsl(219, 53%, 57%)
HSV	hsv(219, 57%, 80%)
CMYK	cmyk(57.1%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(53.51, 8.76, -43.64)
CIE-LCH	lch(53.51, 44.51, 281.35°)
OKLab	oklab(60.2% -0.0168 -0.1236)
OKLCH	oklch(60.2% 0.125 262.3)
XYZ	xyz(22.2956, 21.5150, 59.4662)
Luminance	0.2152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FCB #CBA357

analogous

#57B9CB #577FCB #6957CB

triadic

#577FCB #CB577F #7FCB57

tetradic

#577FCB #CB57B9 #CBA357 #57CB69

square

#577FCB #CB57B9 #CBA357 #57CB69

split-complementary

#577FCB #CB6957 #B9CB57

monochromatic

#284680 #3660AF #577FCB #86A3D9 #B4C6E8

Accessibility & contrast

On white

3.96

#577FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#577FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FCB

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FCB	#FFFFFF	#000000	##000000
##577FCB	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CE

Deuteranopia (green-blind)

#517BC9

Tritanopia (blue-blind)

#00909B

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577fcb;
/* rgb */ color: rgb(87, 127, 203);
/* oklch */ color: oklch(60.2% 0.125 262.3);

Tailwind

colors: {
  custom: {
    50: '#8fa3db',
    500: '#577fcb',
    950: '#000000',
  },
}

SCSS

$custom: #577fcb;
$custom-light: #8fa3db;
$custom-dark: #000000;

JSON

{
  "hex": "#577fcb",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 219.31,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.60195,
    "c": 0.12478,
    "h": 262.3
  },
  "luminance": 0.21517
}

Semantic roles & 50–950 ramp

primary

#577FCB

secondary

#D7C6A7

accent

#AA4CDC

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #577FCB

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

Preview Lab → · Contrast checker → · Palette generator →