#5179DB
Closest named color: Royal Blue (#4169E1). oklch(59.6% 0.156 265.3), rgb(81, 121, 219).
Aa
Black text reads best on this color (5.10:1).
About this color
#5179DB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.156 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.048 away. Black text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.10:1 |
| White text | 4.11:1 |
Values
| HEX | #5179DB |
| RGB | rgb(81, 121, 219) |
| HSL | hsl(223, 66%, 59%) |
| OKLCH | oklch(59.6% 0.156 265.3) |
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 #5179DB | 4.11:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #5179DB | 5.10:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #5179DB text on white | 4.11:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #5179DB text on black | 5.10:1 | AA | Lc -33.7 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#A9C0F3
oklch(80.8% 0.077 265.8)
-
Step 400
400
#7C9EED
oklch(70.7% 0.122 265.7)
-
Step 500
500 (this color)
#5179DB
oklch(59.6% 0.156 265.3)
-
Step 600
600
#426BD5
oklch(55.6% 0.169 265.3)
-
Step 700
700
#3459B9
oklch(49.2% 0.158 265.2)
-
Step 800
800
#2B4995
oklch(42.6% 0.13 265.1)
-
Step 900
900
#273E77
oklch(37.7% 0.101 265.3)
-
Step 950
950
#172546
oklch(27.1% 0.064 265.1)
#5179DB 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) | #4A84DF | 0.028 |
| Deuteranopia (no green cones) | #3377D9 | 0.029 |
| Tritanopia (no blue cones) | #008F9F | 0.131 |
| Achromatopsia (no color) | #7D7D7D | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5179DB
#5179DB
oklch(59.6% 0.156 265.3)
- #A07800
#A07800
oklch(59.6% 0.122 85.2)
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 #5179DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.048
- Soft Blue #6488EA ΔE 0.051
- Windows Blue #3778BF ΔE 0.051
- Cornflower #6A79F7 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.054
- Clear Blue #247AFD ΔE 0.059
- Water Blue #0E87CC ΔE 0.060
- Cerulean Blue #056EEE ΔE 0.066
Use #5179DB 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.