#51A5DB#51A5DB

#51A5DB is a light, moderate cyan. Relative luminance 0.338; OKLCH L 69.2% C 0.114 H 239.5°. Best body text is #000000 at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#51A5DB
RGB	rgb(81, 165, 219)
HSL	hsl(203, 66%, 59%)
HSV	hsv(203, 63%, 86%)
CMYK	cmyk(63%, 24.7%, 0%, 14.1%)
CIE-LAB	lab(64.78, -9.17, -34.93)
CIE-LCH	lch(64.78, 36.12, 255.30°)
OKLab	oklab(69.21% -0.0578 -0.0981)
OKLCH	oklch(69.21% 0.114 239.5)
XYZ	xyz(29.6298, 33.7711, 71.9611)
Luminance	0.3377 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5DB #DB8751

analogous

#51DBCC #51A5DB #5160DB

triadic

#51A5DB #DB51A5 #A5DB51

tetradic

#51A5DB #CC51DB #DB8751 #60DB51

square

#51A5DB #CC51DB #DB8751 #60DB51

split-complementary

#51A5DB #DB5160 #DBCC51

monochromatic

#1E6593 #2988C6 #51A5DB #84BFE5 #B6D9F0

Accessibility & contrast

On white

2.71

#51A5DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.75

#51A5DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5DB

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5DB	#FFFFFF	#000000	##000000
##51A5DB	1.00	2.71	7.75	7.75
#FFFFFF	2.71	1.00	21.00	21.00
#000000	7.75	21.00	1.00	1.00
##000000	7.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CA5DE

Deuteranopia (green-blind)

#7997DA

Tritanopia (blue-blind)

#00B3B7

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a5db;
/* rgb */ color: rgb(81, 165, 219);
/* oklch */ color: oklch(69.2% 0.114 239.5);

Tailwind

colors: {
  custom: {
    50: '#8ebfe6',
    500: '#51a5db',
    950: '#000000',
  },
}

SCSS

$custom: #51a5db;
$custom-light: #8ebfe6;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5db",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 219
  },
  "hsl": {
    "h": 203.478,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.69212,
    "c": 0.11387,
    "h": 239.5
  },
  "luminance": 0.33774
}

Semantic roles & 50–950 ramp

primary

#51A5DB

secondary

#DFBEA9

accent

#813FE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A5DB

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

Preview Lab → · Contrast checker → · Palette generator →