#51A5DC#51A5DC

#51A5DC is a light, moderate cyan. Relative luminance 0.338; OKLCH L 69.3% C 0.115 H 240.0°. Best body text is #000000 at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#51A5DC
RGB	rgb(81, 165, 220)
HSL	hsl(204, 67%, 59%)
HSV	hsv(204, 63%, 86%)
CMYK	cmyk(63.2%, 25%, 0%, 13.7%)
CIE-LAB	lab(64.82, -8.84, -35.42)
CIE-LCH	lch(64.82, 36.51, 255.98°)
OKLab	oklab(69.26% -0.0574 -0.0995)
OKLCH	oklch(69.26% 0.115 240)
XYZ	xyz(29.7618, 33.8239, 72.6565)
Luminance	0.3383 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5DC #DC8851

analogous

#51DCCE #51A5DC #5160DC

triadic

#51A5DC #DC51A5 #A5DC51

tetradic

#51A5DC #CE51DC #DC8851 #60DC51

square

#51A5DC #CE51DC #DC8851 #60DC51

split-complementary

#51A5DC #DC5160 #DCCE51

monochromatic

#1E6695 #2889C8 #51A5DC #84BFE6 #B7DAF0

Accessibility & contrast

On white

2.70

#51A5DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.77

#51A5DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5DC

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5DC	#FFFFFF	#000000	##000000
##51A5DC	1.00	2.70	7.77	7.77
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.77	21.00	1.00	1.00
##000000	7.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CA5DF

Deuteranopia (green-blind)

#7997DB

Tritanopia (blue-blind)

#00B3B8

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a5dc;
/* rgb */ color: rgb(81, 165, 220);
/* oklch */ color: oklch(69.3% 0.115 240.0);

Tailwind

colors: {
  custom: {
    50: '#8fbfe7',
    500: '#51a5dc',
    950: '#000000',
  },
}

SCSS

$custom: #51a5dc;
$custom-light: #8fbfe7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5dc",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 220
  },
  "hsl": {
    "h": 203.741,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.69259,
    "c": 0.11492,
    "h": 240
  },
  "luminance": 0.33827
}

Semantic roles & 50–950 ramp

primary

#51A5DC

secondary

#E0BFA9

accent

#823EE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A5DC

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

Preview Lab → · Contrast checker → · Palette generator →