#3C78EB
Closest named color: Clear Blue (#247AFD). oklch(59.5% 0.185 261.8), rgb(60, 120, 235).
Aa
Black text reads best on this color (5.07:1).
About this color
#3C78EB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.185 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.029 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #3C78EB |
| RGB | rgb(60, 120, 235) |
| HSL | hsl(219, 81%, 58%) |
| OKLCH | oklch(59.5% 0.185 261.8) |
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 #3C78EB | 4.13:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #3C78EB | 5.07:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #3C78EB text on white | 4.13:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #3C78EB text on black | 5.07:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A1C1FC
oklch(80.9% 0.091 262.4)
-
Step 400
400
#6D9FFA
oklch(70.7% 0.144 261.6)
-
Step 500
500 (this color)
#3C78EB
oklch(59.5% 0.185 261.8)
-
Step 600
600
#2969E6
oklch(55.5% 0.201 261.9)
-
Step 700
700
#1C57C8
oklch(49.1% 0.186 261.7)
-
Step 800
800
#1948A2
oklch(42.8% 0.155 261.7)
-
Step 900
900
#1A3D80
oklch(37.6% 0.121 261.8)
-
Step 950
950
#10254B
oklch(27.1% 0.076 261.2)
#3C78EB 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) | #3485EF | 0.033 |
| Deuteranopia (no green cones) | #0075E9 | 0.030 |
| Tritanopia (no blue cones) | #0093A6 | 0.145 |
| Achromatopsia (no color) | #7D7D7D | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C78EB
#3C78EB
oklch(59.5% 0.185 261.8)
- #A37600
#A37600
oklch(59.5% 0.123 81.9)
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 #3C78EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.029
- Royal Blue #4169E1 ΔE 0.039
- Cerulean Blue #056EEE ΔE 0.041
- Cornflower #6A79F7 ΔE 0.053
- Neon Blue #4361EE ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.062
- Soft Blue #6488EA ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.064
Use #3C78EB 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.