#577EB5#577EB5

#577EB5 is a mid, moderate blue. Relative luminance 0.203; OKLCH L 58.8% C 0.096 H 257.1°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#577EB5
RGB	rgb(87, 126, 181)
HSL	hsl(215, 39%, 53%)
HSV	hsv(215, 52%, 71%)
CMYK	cmyk(51.9%, 30.4%, 0%, 29%)
CIE-LAB	lab(52.16, 2.27, -33.19)
CIE-LCH	lch(52.16, 33.27, 273.92°)
OKLab	oklab(58.79% -0.0214 -0.0932)
OKLCH	oklch(58.79% 0.096 257.1)
XYZ	xyz(19.7290, 20.2827, 46.5824)
Luminance	0.2028 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EB5 #B58E57

analogous

#57ADB5 #577EB5 #5F57B5

triadic

#577EB5 #B5577E #7EB557

tetradic

#577EB5 #B557AD #B58E57 #57B55F

square

#577EB5 #B557AD #B58E57 #57B55F

split-complementary

#577EB5 #B55F57 #ADB557

monochromatic

#2D4465 #3F6190 #577EB5 #819FC8 #ACBFDA

Accessibility & contrast

On white

4.15

#577EB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#577EB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EB5

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EB5	#FFFFFF	#000000	##000000
##577EB5	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6881B7

Deuteranopia (green-blind)

#5D78B4

Tritanopia (blue-blind)

#288A91

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577eb5;
/* rgb */ color: rgb(87, 126, 181);
/* oklch */ color: oklch(58.8% 0.096 257.1);

Tailwind

colors: {
  custom: {
    50: '#8ca3cb',
    500: '#577eb5',
    950: '#000000',
  },
}

SCSS

$custom: #577eb5;
$custom-light: #8ca3cb;
$custom-dark: #000000;

JSON

{
  "hex": "#577eb5",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 181
  },
  "hsl": {
    "h": 215.106,
    "s": 38.843,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58791,
    "c": 0.09568,
    "h": 257.1
  },
  "luminance": 0.20284
}

Semantic roles & 50–950 ramp

primary

#577EB5

secondary

#C8B79F

accent

#9E59CF

background

#F8FAFC

surface

#F0F3F8

border

#CBCDD1

text

#0C0F13

muted

#7D7F82

Preview Lab

Preview with #577EB5

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

Preview Lab → · Contrast checker → · Palette generator →