#3B78FF
Closest named color: Clear Blue (#247AFD). oklch(60.9% 0.211 263.2), rgb(59, 120, 255).
Aa
Black text reads best on this color (5.31:1).
About this color
#3B78FF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.211 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.015 away. Black text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.211) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.31:1 |
| White text | 3.94:1 |
Values
| HEX | #3B78FF |
| RGB | rgb(59, 120, 255) |
| HSL | hsl(221, 100%, 62%) |
| OKLCH | oklch(60.9% 0.211 263.2) |
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 #3B78FF | 3.94:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #3B78FF | 5.31:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #3B78FF text on white | 3.94:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #3B78FF text on black | 5.31:1 | AA | Lc -35.3 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9DFF
oklch(70.6% 0.153 263.3)
-
Step 500
500 (this color)
#3B78FF
oklch(60.9% 0.211 263.2)
-
Step 600
600
#2463F6
oklch(55.5% 0.229 263.3)
-
Step 700
700
#1851D7
oklch(49.2% 0.213 263.3)
-
Step 800
800
#1543AD
oklch(42.6% 0.177 263.2)
-
Step 900
900
#173B89
oklch(37.8% 0.137 262.9)
-
Step 950
950
#0E2350
oklch(26.9% 0.087 263)
#3B78FF 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) | #0089FF | 0.043 |
| Deuteranopia (no green cones) | #0077FC | 0.026 |
| Tritanopia (no blue cones) | #0099B0 | 0.165 |
| Achromatopsia (no color) | #808080 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B78FF
#3B78FF
oklch(60.9% 0.211 263.2)
- #A77B00
#A77B00
oklch(61% 0.125 83.4)
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 #3B78FF, closest first.
No curated palette has a color within ΔE 0.04 of #3B78FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.015
- Cerulean Blue #056EEE ΔE 0.047
- Cornflower #6A79F7 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.056
- Neon Blue #4361EE ΔE 0.058
- Bright Blue #0165FC ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.059
- Soft Blue #6488EA ΔE 0.070
Use #3B78FF 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.