#2E78CE
Closest named color: Windows Blue (#3778BF). oklch(57.1% 0.151 254.6), rgb(46, 120, 206).
Aa
Black text reads best on this color (4.69:1).
About this color
#2E78CE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.151 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.024 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #2E78CE |
| RGB | rgb(46, 120, 206) |
| HSL | hsl(212, 63%, 49%) |
| OKLCH | oklch(57.1% 0.151 254.6) |
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 #2E78CE | 4.47:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #2E78CE | 4.69:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #2E78CE text on white | 4.47:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #2E78CE text on black | 4.69:1 | AA | Lc -31.0 | 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
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C3EC
oklch(80.8% 0.068 254.8)
-
Step 400
400
#71A3E3
oklch(70.6% 0.109 255)
-
Step 500
500
#498BDB
oklch(63.1% 0.139 254.5)
-
Step 600
600 (this color)
#2E78CE
oklch(57.1% 0.151 254.6)
-
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
#1B4270
oklch(37.6% 0.091 254.4)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#2E78CE 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) | #4E7FD1 | 0.036 |
| Deuteranopia (no green cones) | #3170CC | 0.021 |
| Tritanopia (no blue cones) | #008C99 | 0.114 |
| Achromatopsia (no color) | #777777 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E78CE
#2E78CE
oklch(57.1% 0.151 254.6)
- #A16B00
#A16B00
oklch(57.1% 0.121 74.3)
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 #2E78CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.024
- Water Blue #0E87CC ΔE 0.042
- Nice Blue #107AB0 ΔE 0.052
- Royal Blue #4169E1 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.054
- French Blue #436BAD ΔE 0.057
- Steel Blue #4682B4 ΔE 0.058
- Cool Blue #4984B8 ΔE 0.058
Use #2E78CE 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.