#2E78CF
Closest named color: Windows Blue (#3778BF). oklch(57.2% 0.152 254.8), rgb(46, 120, 207).
Aa
Black text reads best on this color (4.70:1).
About this color
#2E78CF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.152 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.025 away. Black text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #2E78CF |
| RGB | rgb(46, 120, 207) |
| HSL | hsl(212, 64%, 50%) |
| OKLCH | oklch(57.2% 0.152 254.8) |
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 #2E78CF | 4.46:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #2E78CF | 4.70:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #2E78CF text on white | 4.46:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #2E78CF text on black | 4.70:1 | AA | Lc -31.1 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A3C3ED
oklch(80.8% 0.069 255.4)
-
Step 400
400
#70A3E4
oklch(70.6% 0.11 255)
-
Step 500
500
#498BDC
oklch(63.1% 0.14 254.8)
-
Step 600
600 (this color)
#2E78CF
oklch(57.2% 0.152 254.8)
-
Step 700
700
#1B60AE
oklch(49.1% 0.141 254.8)
-
Step 800
800
#194F8D
oklch(42.7% 0.117 254.6)
-
Step 900
900
#1B4271
oklch(37.7% 0.092 254.8)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#2E78CF 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) | #4D7FD2 | 0.035 |
| Deuteranopia (no green cones) | #3070CD | 0.021 |
| Tritanopia (no blue cones) | #008D99 | 0.117 |
| Achromatopsia (no color) | #777777 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E78CF
#2E78CF
oklch(57.2% 0.152 254.8)
- #A16C00
#A16C00
oklch(57.3% 0.121 75.1)
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 #2E78CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.025
- Water Blue #0E87CC ΔE 0.042
- Royal Blue #4169E1 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.053
- Mid Blue #276AB3 ΔE 0.055
- French Blue #436BAD ΔE 0.058
- Steel Blue #4682B4 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.059
Use #2E78CF 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.