#3C79D7
Closest named color: Windows Blue (#3778BF). oklch(58.4% 0.158 258.9), rgb(60, 121, 215).
Aa
Black text reads best on this color (4.90:1).
About this color
#3C79D7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.158 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.038 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #3C79D7 |
| RGB | rgb(60, 121, 215) |
| HSL | hsl(216, 66%, 54%) |
| OKLCH | oklch(58.4% 0.158 258.9) |
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 #3C79D7 | 4.27:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #3C79D7 | 4.90:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #3C79D7 text on white | 4.27:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #3C79D7 text on black | 4.90:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2EF
oklch(80.8% 0.071 259.1)
-
Step 400
400
#75A2E7
oklch(70.8% 0.113 258.7)
-
Step 500
500
#5088E0
oklch(63% 0.146 259.1)
-
Step 600
600 (this color)
#3C79D7
oklch(58.4% 0.158 258.9)
-
Step 700
700
#265EB2
oklch(49.2% 0.146 258.7)
-
Step 800
800
#214D90
oklch(42.7% 0.121 258.8)
-
Step 900
900
#204173
oklch(37.8% 0.094 258.6)
-
Step 950
950
#132643
oklch(26.9% 0.06 258.6)
#3C79D7 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) | #4A82DB | 0.029 |
| Deuteranopia (no green cones) | #2D74D5 | 0.019 |
| Tritanopia (no blue cones) | #008F9D | 0.125 |
| Achromatopsia (no color) | #7A7A7A | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C79D7
#3C79D7
oklch(58.4% 0.158 258.9)
- #A27100
#A27100
oklch(58.4% 0.122 78.5)
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 #3C79D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.038
- Royal Blue #4169E1 ΔE 0.045
- Water Blue #0E87CC ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.056
- Clear Blue #247AFD ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Cool Blue #4984B8 ΔE 0.063
- Steel Blue #4682B4 ΔE 0.065
Use #3C79D7 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.