#2979FF colour

#2979FF: RGB 41, 121, 255, HSL 218, 100%, 58%. Black text passes AA (5.27:1), white passes AA for large text (3.98:1). Tints, shades and palettes.

#2979FF

Nearest CSS name: royalblue #4169e1 (not an exact match)
Described as: a vivid sky blue
Red, green, blue: 41, 121, 255
Material 2014: Blue A400
Web safe: No
Luminance: 0.2137 (WCAG relative luminance, 0 is black, 1 is white)

Colour codes

HEX	`#2979ff`
RGB	`rgb(41, 121, 255)`
RGB (percent)	`rgb(16.1% 47.5% 100%)`
HSL	`hsl(217.6, 100%, 58%)`
HSV / HSB	`hsv(217.6, 83.9%, 100%)`
HWB	`hwb(217.6 16.1% 0%)`
CMYK (naive)	`cmyk(84%, 53%, 0%, 0%)`
CIELAB (D50)	`lab(52.13% 14.78 -74.78)`
OKLCH	`oklch(60.61% 0.214 260.38)`
Decimal	`2718207`

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, 3.98:1The quick brown fox jumps over the lazy dog.

Black text, 5.27:1The 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	3.98:1	Fail	Pass	Fail	Fail
Black	5.27:1	Pass	Pass	Fail	Pass

Black text is the better choice on #2979FF (5.27:1). 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%#3c85ff 18%#5091ff 27%#639eff 36%#77aaff 45%#8ab6ff 55%#9ec2ff 64%#b1ceff 73%#c5daff 82%#d8e7ff 91%#ecf3ff

9%#256ee8 18%#2263d1 27%#1e58b9 36%#1a4da2 45%#16428b 55%#133774 64%#0f2c5d 73%#0b2146 82%#07162e 91%#040b17

Colour harmonies

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

Complementary

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

#2979ff #ffaf29

Analogous

Neighbours 30° either side.

#29e4ff #2979ff #4429ff

Triadic

Three hues 120° apart.

#2979ff #ff2979 #79ff29

Split complementary

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

#2979ff #ff4429 #e4ff29

Tetradic (square)

Four hues 90° apart.

#2979ff #ff29e4 #ffaf29 #29ff44

How it looks with colour blindness

Normal vision#2979ff Protanopia#0089ff Deuteranopia#0076fc Tritanopia#009ab0 Achromatopsia#7f7f7f

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.

Material Blue palette

50#e3f2fd 100#bbdefb 200#90caf9 300#64b5f6 400#42a5f5 500#2196f3 600#1e88e5 700#1976d2 800#1565c0 900#0d47a1 A100#82b1ff A200#448aff A400#2979ff A700#2962ff

CSS

Text colour	`color: #2979ff;`
Background	`background-color: #2979ff;`
Border	`border: 1px solid #2979ff;`
Half transparent	`background-color: rgb(41 121 255 / 50%);`
Custom property	`--colour-main: #2979ff;`
Gradient to a darker shade	`background: linear-gradient(135deg, #2979ff, #194999);`
Gradient from a lighter tint	`background: linear-gradient(180deg, #7fafff, #2979ff);`
Text on this colour	`background-color: #2979ff; 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 #2979FF 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.