#00A3B4 colour

#00A3B4 is a vivid cyan close to CSS cadetblue: RGB 0, 163, 180, HSL 186, 100%, 35%. Black text passes AA (6.90:1). Tints, shades and colour harmonies.

#00A3B4

Nearest CSS name: cadetblue #5f9ea0 (not an exact match)
Described as: a vivid cyan
Red, green, blue: 0, 163, 180
Web safe: No
Luminance: 0.2949 (WCAG relative luminance, 0 is black, 1 is white)

Colour codes

HEX	`#00a3b4`
RGB	`rgb(0, 163, 180)`
RGB (percent)	`rgb(0% 63.9% 70.6%)`
HSL	`hsl(185.7, 100%, 35.3%)`
HSV / HSB	`hsv(185.7, 100%, 70.6%)`
HWB	`hwb(185.7 0% 29.4%)`
CMYK (naive)	`cmyk(100%, 9%, 0%, 29%)`
CIELAB (D50)	`lab(60.8% -31.97 -19.48)`
OKLCH	`oklch(65.43% 0.1124 207.85)`
Decimal	`41908`

CMYK here is the plain formula with no colour profile, so treat it as a starting point; a printer's profile gives the real ink values. CIELAB uses a D50 white point, as CSS lab() does. HSV is not a CSS function, so it is shown for design apps only.

Contrast with white and black text

White text, 3.04:1The quick brown fox jumps over the lazy dog.

Black text, 6.90:1The quick brown fox jumps over the lazy dog.

Text	Ratio	AA normal (4.5)	AA large (3)	AAA normal (7)	AAA large (4.5)
White	3.04:1	Fail	Pass	Fail	Fail
Black	6.90:1	Pass	Pass	Fail	Pass

Black text is the better choice on #00A3B4 (6.90:1). Ratios use the WCAG 2.2 formula; large text means at least 24px, or 18.66px bold. Check another pair.

Tints and shades

Mixed with white, then with black, in ten even steps (straight sRGB mixing, as most design tools do).

9%#17abbb 18%#2eb4c2 27%#46bcc8 36%#5dc4cf 45%#74cdd6 55%#8bd5dd 64%#a2dee4 73%#b9e6eb 82%#d1eef1 91%#e8f7f8

9%#0094a4 18%#008593 27%#007783 36%#006873 45%#005962 55%#004a52 64%#003b41 73%#002c31 82%#001e21 91%#000f10

Colour harmonies

Hue turned around the HSL colour wheel, saturation and lightness kept.

Complementary

The hue opposite on the colour wheel (180°).

#00a3b4 #b41100

Analogous

Neighbours 30° either side.

#00b46b #00a3b4 #0049b4

Triadic

Three hues 120° apart.

#00a3b4 #b400a3 #a3b400

Split complementary

The two hues either side of the complement (150° and 210°).

#00a3b4 #b40049 #b46b00

Tetradic (square)

Four hues 90° apart.

#00a3b4 #6b00b4 #b41100 #49b400

How it looks with colour blindness

Normal vision#00a3b4 Protanopia#939cb5 Deuteranopia#7f8db4 Tritanopia#00aba8 Achromatopsia#949494

Simulated with the Machado, Oliveira and Fernandes (2009) matrices at full severity, applied in linear RGB; achromatopsia shows the colour's luminance as grey. Milder forms (protanomaly, deuteranomaly) are far more common and shift colours less. Never use colour as the only way to carry meaning.

CSS

Text colour	`color: #00a3b4;`
Background	`background-color: #00a3b4;`
Border	`border: 1px solid #00a3b4;`
Half transparent	`background-color: rgb(0 163 180 / 50%);`
Custom property	`--colour-main: #00a3b4;`
Gradient to a darker shade	`background: linear-gradient(135deg, #00a3b4, #00626c);`
Gradient from a lighter tint	`background: linear-gradient(180deg, #66c8d2, #00a3b4);`
Text on this colour	`background-color: #00a3b4; color: #000;`

Similar named colours

Distance is measured in OKLab, scaled by 100; under about 2 is hard to tell apart side by side.

Convert #00A3B4 to other formats · Build a palette from it · Check contrast · All named colours

Colour names from CSS Color Module Level 4. Palette values from the Tailwind CSS v3 default palette (MIT licence) and the Material Design 2014 colour palette as published in Material Design Lite (Apache License 2.0). All other values are calculated from the hex code.