#577ECB#577ECB

#577ECB is a mid, vivid blue. Relative luminance 0.213; OKLCH L 60.0% C 0.126 H 262.8°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#577ECB
RGB	rgb(87, 126, 203)
HSL	hsl(220, 53%, 57%)
HSV	hsv(220, 57%, 80%)
CMYK	cmyk(57.1%, 37.9%, 0%, 20.4%)
CIE-LAB	lab(53.23, 9.36, -44.08)
CIE-LCH	lch(53.23, 45.06, 281.99°)
OKLab	oklab(59.98% -0.0157 -0.1249)
OKLCH	oklch(59.98% 0.126 262.8)
XYZ	xyz(22.1671, 21.2579, 59.4234)
Luminance	0.2126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577ECB #CBA457

analogous

#57B8CB #577ECB #6A57CB

triadic

#577ECB #CB577E #7ECB57

tetradic

#577ECB #CB57B8 #CBA457 #57CB6A

square

#577ECB #CB57B8 #CBA457 #57CB6A

split-complementary

#577ECB #CB6A57 #B8CB57

monochromatic

#284580 #365FAF #577ECB #86A2D9 #B4C6E8

Accessibility & contrast

On white

4.00

#577ECB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#577ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577ECB

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577ECB	#FFFFFF	#000000	##000000
##577ECB	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E85CE

Deuteranopia (green-blind)

#4F7AC9

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577ecb;
/* rgb */ color: rgb(87, 126, 203);
/* oklch */ color: oklch(60.0% 0.126 262.8);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#577ecb",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 203
  },
  "hsl": {
    "h": 219.828,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.5998,
    "c": 0.12591,
    "h": 262.8
  },
  "luminance": 0.2126
}

Semantic roles & 50–950 ramp

primary

#577ECB

secondary

#D7C7A7

accent

#AC4CDC

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577ECB

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

Preview Lab → · Contrast checker → · Palette generator →