#51A5E1#51A5E1

#51A5E1 is a light, vivid cyan. Relative luminance 0.341; OKLCH L 69.5% C 0.120 H 242.3°. Best body text is #000000 at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#51A5E1
RGB	rgb(81, 165, 225)
HSL	hsl(205, 71%, 60%)
HSV	hsv(205, 64%, 88%)
CMYK	cmyk(64%, 26.7%, 0%, 11.8%)
CIE-LAB	lab(65.04, -7.23, -37.85)
CIE-LCH	lch(65.04, 38.53, 259.19°)
OKLab	oklab(69.5% -0.0558 -0.1065)
OKLCH	oklch(69.5% 0.12 242.3)
XYZ	xyz(30.4339, 34.0928, 76.1962)
Luminance	0.3410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5E1 #E18D51

analogous

#51E1D5 #51A5E1 #515DE1

triadic

#51A5E1 #E151A5 #A5E151

tetradic

#51A5E1 #D551E1 #E18D51 #5DE151

square

#51A5E1 #D551E1 #E18D51 #5DE151

split-complementary

#51A5E1 #E1515D #E1D551

monochromatic

#1B679D #2489D1 #51A5E1 #85C0EA #B9DBF3

Accessibility & contrast

On white

2.69

#51A5E1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.82

#51A5E1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5E1

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5E1	#FFFFFF	#000000	##000000
##51A5E1	1.00	2.69	7.82	7.82
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.82	21.00	1.00	1.00
##000000	7.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8AA6E4

Deuteranopia (green-blind)

#7698E0

Tritanopia (blue-blind)

#00B4BA

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a5e1;
/* rgb */ color: rgb(81, 165, 225);
/* oklch */ color: oklch(69.5% 0.120 242.3);

Tailwind

colors: {
  custom: {
    50: '#8fbfea',
    500: '#51a5e1',
    950: '#000000',
  },
}

SCSS

$custom: #51a5e1;
$custom-light: #8fbfea;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5e1",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 225
  },
  "hsl": {
    "h": 205,
    "s": 70.588,
    "l": 60
  },
  "oklch": {
    "l": 0.69499,
    "c": 0.12028,
    "h": 242.3
  },
  "luminance": 0.34096
}

Semantic roles & 50–950 ramp

primary

#51A5E1

secondary

#E3C2AB

accent

#853AED

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A5E1

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

Preview Lab → · Contrast checker → · Palette generator →