#51A8DB#51A8DB

#51A8DB is a light, moderate cyan. Relative luminance 0.349; OKLCH L 69.9% C 0.112 H 237.1°. Best body text is #000000 at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#51A8DB
RGB	rgb(81, 168, 219)
HSL	hsl(202, 66%, 59%)
HSV	hsv(202, 63%, 86%)
CMYK	cmyk(63%, 23.3%, 0%, 14.1%)
CIE-LAB	lab(65.64, -10.81, -33.59)
CIE-LCH	lch(65.64, 35.29, 252.16°)
OKLab	oklab(69.9% -0.0609 -0.0942)
OKLCH	oklch(69.9% 0.112 237.1)
XYZ	xyz(30.1773, 34.8660, 72.1436)
Luminance	0.3487 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8DB #DB8451

analogous

#51DBC9 #51A8DB #5163DB

triadic

#51A8DB #DB51A8 #A8DB51

tetradic

#51A8DB #C951DB #DB8451 #63DB51

square

#51A8DB #C951DB #DB8451 #63DB51

split-complementary

#51A8DB #DB5163 #DBC951

monochromatic

#1E6893 #298CC6 #51A8DB #84C1E5 #B6DBF0

Accessibility & contrast

On white

2.63

#51A8DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.97

#51A8DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8DB

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8DB	#FFFFFF	#000000	##000000
##51A8DB	1.00	2.63	7.97	7.97
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.97	21.00	1.00	1.00
##000000	7.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A7DD

Deuteranopia (green-blind)

#7D99DA

Tritanopia (blue-blind)

#00B5B9

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a8db;
/* rgb */ color: rgb(81, 168, 219);
/* oklch */ color: oklch(69.9% 0.112 237.1);

Tailwind

colors: {
  custom: {
    50: '#8fc1e6',
    500: '#51a8db',
    950: '#000000',
  },
}

SCSS

$custom: #51a8db;
$custom-light: #8fc1e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8db",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 219
  },
  "hsl": {
    "h": 202.174,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.69897,
    "c": 0.1122,
    "h": 237.1
  },
  "luminance": 0.34869
}

Semantic roles & 50–950 ramp

primary

#51A8DB

secondary

#DFBDA9

accent

#7E3FE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A8DB

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

Preview Lab → · Contrast checker → · Palette generator →