#51A5DA#51A5DA

#51A5DA is a light, moderate cyan. Relative luminance 0.337; OKLCH L 69.2% C 0.113 H 239.0°. Best body text is #000000 at 7.74:1 contrast (WCAG AA passes).

Color values

HEX	#51A5DA
RGB	rgb(81, 165, 218)
HSL	hsl(203, 65%, 59%)
HSV	hsv(203, 63%, 85%)
CMYK	cmyk(62.8%, 24.3%, 0%, 14.5%)
CIE-LAB	lab(64.74, -9.49, -34.45)
CIE-LCH	lch(64.74, 35.73, 254.60°)
OKLab	oklab(69.16% -0.0581 -0.0967)
OKLCH	oklch(69.16% 0.113 239)
XYZ	xyz(29.4985, 33.7186, 71.2698)
Luminance	0.3372 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5DA #DA8651

analogous

#51DACB #51A5DA #5160DA

triadic

#51A5DA #DA51A5 #A5DA51

tetradic

#51A5DA #CB51DA #DA8651 #60DA51

square

#51A5DA #CB51DA #DA8651 #60DA51

split-complementary

#51A5DA #DA5160 #DACB51

monochromatic

#1F6592 #2A88C4 #51A5DA #83BFE5 #B6D9EF

Accessibility & contrast

On white

2.71

#51A5DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.74

#51A5DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5DA

7.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5DA	#FFFFFF	#000000	##000000
##51A5DA	1.00	2.71	7.74	7.74
#FFFFFF	2.71	1.00	21.00	21.00
#000000	7.74	21.00	1.00	1.00
##000000	7.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DA5DC

Deuteranopia (green-blind)

#7A97D9

Tritanopia (blue-blind)

#00B2B7

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a5da;
/* rgb */ color: rgb(81, 165, 218);
/* oklch */ color: oklch(69.2% 0.113 239.0);

Tailwind

colors: {
  custom: {
    50: '#8ebfe5',
    500: '#51a5da',
    950: '#000000',
  },
}

SCSS

$custom: #51a5da;
$custom-light: #8ebfe5;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5da",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 218
  },
  "hsl": {
    "h": 203.212,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.69165,
    "c": 0.11283,
    "h": 239
  },
  "luminance": 0.33722
}

Semantic roles & 50–950 ramp

primary

#51A5DA

secondary

#DEBDA8

accent

#8140E8

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A5DA

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

Preview Lab → · Contrast checker → · Palette generator →