#51A7DB#51A7DB

#51A7DB is a light, moderate cyan. Relative luminance 0.345; OKLCH L 69.7% C 0.113 H 237.9°. Best body text is #000000 at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#51A7DB
RGB	rgb(81, 167, 219)
HSL	hsl(203, 66%, 59%)
HSV	hsv(203, 63%, 86%)
CMYK	cmyk(63%, 23.7%, 0%, 14.1%)
CIE-LAB	lab(65.36, -10.27, -34.04)
CIE-LCH	lch(65.36, 35.55, 253.22°)
OKLab	oklab(69.67% -0.0598 -0.0955)
OKLCH	oklch(69.67% 0.113 237.9)
XYZ	xyz(29.9934, 34.4982, 72.0823)
Luminance	0.3450 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A7DB #DB8551

analogous

#51DBCA #51A7DB #5162DB

triadic

#51A7DB #DB51A7 #A7DB51

tetradic

#51A7DB #CA51DB #DB8551 #62DB51

square

#51A7DB #CA51DB #DB8551 #62DB51

split-complementary

#51A7DB #DB5162 #DBCA51

monochromatic

#1E6793 #298BC6 #51A7DB #84C1E5 #B6DAF0

Accessibility & contrast

On white

2.66

#51A7DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.90

#51A7DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A7DB

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A7DB	#FFFFFF	#000000	##000000
##51A7DB	1.00	2.66	7.90	7.90
#FFFFFF	2.66	1.00	21.00	21.00
#000000	7.90	21.00	1.00	1.00
##000000	7.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FA6DD

Deuteranopia (green-blind)

#7C99DA

Tritanopia (blue-blind)

#00B4B9

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a7db;
/* rgb */ color: rgb(81, 167, 219);
/* oklch */ color: oklch(69.7% 0.113 237.9);

Tailwind

colors: {
  custom: {
    50: '#8fc1e6',
    500: '#51a7db',
    950: '#000000',
  },
}

SCSS

$custom: #51a7db;
$custom-light: #8fc1e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51a7db",
  "rgb": {
    "r": 81,
    "g": 167,
    "b": 219
  },
  "hsl": {
    "h": 202.609,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.69669,
    "c": 0.11273,
    "h": 237.9
  },
  "luminance": 0.34501
}

Semantic roles & 50–950 ramp

primary

#51A7DB

secondary

#DFBDA9

accent

#7F3FE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A7DB

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

Preview Lab → · Contrast checker → · Palette generator →