#3179DB
Closest named color: Royal Blue (#4169E1). oklch(58.3% 0.166 257.2), rgb(49, 121, 219).
Aa
Black text reads best on this color (4.88:1).
About this color
#3179DB is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.166 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.043 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #3179DB |
| RGB | rgb(49, 121, 219) |
| HSL | hsl(215, 70%, 53%) |
| OKLCH | oklch(58.3% 0.166 257.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3179DB | 4.29:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #3179DB | 4.88:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #3179DB text on white | 4.29:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #3179DB text on black | 4.88:1 | AA | Lc -32.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A2C3F1
oklch(80.9% 0.075 256.7)
-
Step 400
400
#6FA2EA
oklch(70.6% 0.119 257.1)
-
Step 500
500
#4889E4
oklch(63.1% 0.153 257.3)
-
Step 600
600 (this color)
#3179DB
oklch(58.3% 0.166 257.2)
-
Step 700
700
#1A5EB6
oklch(49.2% 0.154 257.1)
-
Step 800
800
#194D93
oklch(42.7% 0.128 257.3)
-
Step 900
900
#1B4175
oklch(37.7% 0.099 257.1)
-
Step 950
950
#112645
oklch(27% 0.064 258.1)
#3179DB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4682DF | 0.032 |
| Deuteranopia (no green cones) | #2073D9 | 0.021 |
| Tritanopia (no blue cones) | #00909F | 0.127 |
| Achromatopsia (no color) | #7A7A7A | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3179DB
#3179DB
oklch(58.3% 0.166 257.2)
- #A37000
#A37000
oklch(58.3% 0.122 77.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3179DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.043
- Windows Blue #3778BF ΔE 0.043
- Cerulean Blue #056EEE ΔE 0.048
- Water Blue #0E87CC ΔE 0.049
- Clear Blue #247AFD ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.061
- Neon Blue #4361EE ΔE 0.067
- Soft Blue #6488EA ΔE 0.070
Use #3179DB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.