#51A1E4#51A1E4

#51A1E4 is a light, vivid cyan. Relative luminance 0.328; OKLCH L 68.7% C 0.127 H 246.3°. Best body text is #000000 at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#51A1E4
RGB	rgb(81, 161, 228)
HSL	hsl(207, 73%, 61%)
HSV	hsv(207, 64%, 89%)
CMYK	cmyk(64.5%, 29.4%, 0%, 10.6%)
CIE-LAB	lab(64.03, -4.00, -41.08)
CIE-LCH	lch(64.03, 41.27, 264.43°)
OKLab	oklab(68.75% -0.0508 -0.1159)
OKLCH	oklch(68.75% 0.127 246.3)
XYZ	xyz(30.1366, 32.8375, 78.1338)
Luminance	0.3284 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A1E4 #E49451

analogous

#51E4DD #51A1E4 #5157E4

triadic

#51A1E4 #E451A1 #A1E451

tetradic

#51A1E4 #DD51E4 #E49451 #57E451

square

#51A1E4 #DD51E4 #E49451 #57E451

split-complementary

#51A1E4 #E45157 #E4DD51

monochromatic

#1963A2 #2184D7 #51A1E4 #86BEEC #BBDAF4

Accessibility & contrast

On white

2.77

#51A1E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.57

#51A1E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A1E4

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A1E4	#FFFFFF	#000000	##000000
##51A1E4	1.00	2.77	7.57	7.57
#FFFFFF	2.77	1.00	21.00	21.00
#000000	7.57	21.00	1.00	1.00
##000000	7.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#83A3E7

Deuteranopia (green-blind)

#6F95E3

Tritanopia (blue-blind)

#00B1B9

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #51a1e4;
/* rgb */ color: rgb(81, 161, 228);
/* oklch */ color: oklch(68.7% 0.127 246.3);

Tailwind

colors: {
  custom: {
    50: '#90bced',
    500: '#51a1e4',
    950: '#000000',
  },
}

SCSS

$custom: #51a1e4;
$custom-light: #90bced;
$custom-dark: #000000;

JSON

{
  "hex": "#51a1e4",
  "rgb": {
    "r": 81,
    "g": 161,
    "b": 228
  },
  "hsl": {
    "h": 207.347,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.68747,
    "c": 0.1266,
    "h": 246.3
  },
  "luminance": 0.32841
}

Semantic roles & 50–950 ramp

primary

#51A1E4

secondary

#E4C6AC

accent

#6A10D5

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A1E4

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

Preview Lab → · Contrast checker → · Palette generator →