#577EBB#577EBB

#577EBB is a mid, moderate blue. Relative luminance 0.205; OKLCH L 59.1% C 0.104 H 259.1°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#577EBB
RGB	rgb(87, 126, 187)
HSL	hsl(217, 42%, 54%)
HSV	hsv(217, 53%, 73%)
CMYK	cmyk(53.5%, 32.6%, 0%, 26.7%)
CIE-LAB	lab(52.44, 4.18, -36.20)
CIE-LCH	lch(52.44, 36.44, 276.58°)
OKLab	oklab(59.1% -0.0197 -0.102)
OKLCH	oklch(59.1% 0.104 259.1)
XYZ	xyz(20.3579, 20.5343, 49.8948)
Luminance	0.2054 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EBB #BB9457

analogous

#57B0BB #577EBB #6257BB

triadic

#577EBB #BB577E #7EBB57

tetradic

#577EBB #BB57B0 #BB9457 #57BB62

square

#577EBB #BB57B0 #BB9457 #57BB62

split-complementary

#577EBB #BB6257 #B0BB57

monochromatic

#2C456C #3D6097 #577EBB #839FCD #AEC1DE

Accessibility & contrast

On white

4.11

#577EBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#577EBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EBB

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EBB	#FFFFFF	#000000	##000000
##577EBB	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6682BE

Deuteranopia (green-blind)

#5A79BA

Tritanopia (blue-blind)

#208B94

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577ebb;
/* rgb */ color: rgb(87, 126, 187);
/* oklch */ color: oklch(59.1% 0.104 259.1);

Tailwind

colors: {
  custom: {
    50: '#8da3cf',
    500: '#577ebb',
    950: '#000000',
  },
}

SCSS

$custom: #577ebb;
$custom-light: #8da3cf;
$custom-dark: #000000;

JSON

{
  "hex": "#577ebb",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 187
  },
  "hsl": {
    "h": 216.6,
    "s": 42.373,
    "l": 53.725
  },
  "oklch": {
    "l": 0.59102,
    "c": 0.10386,
    "h": 259.1
  },
  "luminance": 0.20536
}

Semantic roles & 50–950 ramp

primary

#577EBB

secondary

#CCBCA2

accent

#A256D2

background

#F9FAFC

surface

#F1F3F9

border

#CBCDD2

text

#0D0F14

muted

#7E7F82

Preview Lab

Preview with #577EBB

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

Preview Lab → · Contrast checker → · Palette generator →