#51A5DF#51A5DF

#51A5DF is a light, moderate cyan. Relative luminance 0.340; OKLCH L 69.4% C 0.118 H 241.4°. Best body text is #000000 at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#51A5DF
RGB	rgb(81, 165, 223)
HSL	hsl(205, 69%, 60%)
HSV	hsv(205, 64%, 87%)
CMYK	cmyk(63.7%, 26%, 0%, 12.5%)
CIE-LAB	lab(64.95, -7.88, -36.88)
CIE-LCH	lch(64.95, 37.71, 257.94°)
OKLab	oklab(69.4% -0.0565 -0.1037)
OKLCH	oklch(69.4% 0.118 241.4)
XYZ	xyz(30.1627, 33.9843, 74.7678)
Luminance	0.3399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5DF #DF8B51

analogous

#51DFD2 #51A5DF #515EDF

triadic

#51A5DF #DF51A5 #A5DF51

tetradic

#51A5DF #D251DF #DF8B51 #5EDF51

square

#51A5DF #D251DF #DF8B51 #5EDF51

split-complementary

#51A5DF #DF515E #DFD251

monochromatic

#1C6699 #2689CD #51A5DF #85C0E9 #B8DAF2

Accessibility & contrast

On white

2.69

#51A5DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.80

#51A5DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5DF

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5DF	#FFFFFF	#000000	##000000
##51A5DF	1.00	2.69	7.80	7.80
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.80	21.00	1.00	1.00
##000000	7.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA5E2

Deuteranopia (green-blind)

#7797DE

Tritanopia (blue-blind)

#00B3B9

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a5df;
/* rgb */ color: rgb(81, 165, 223);
/* oklch */ color: oklch(69.4% 0.118 241.4);

Tailwind

colors: {
  custom: {
    50: '#8fbfe9',
    500: '#51a5df',
    950: '#000000',
  },
}

SCSS

$custom: #51a5df;
$custom-light: #8fbfe9;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5df",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 223
  },
  "hsl": {
    "h": 204.507,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.69402,
    "c": 0.11811,
    "h": 241.4
  },
  "luminance": 0.33987
}

Semantic roles & 50–950 ramp

primary

#51A5DF

secondary

#E1C1AA

accent

#843CEC

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A5DF

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

Preview Lab → · Contrast checker → · Palette generator →