#4E78AF
Closest named color: Flat Blue (#3C73A8). oklch(56.6% 0.098 255.6), rgb(78, 120, 175).
Aa
Black text reads best on this color (4.62:1).
About this color
#4E78AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.098 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.027 away. Black text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #4E78AF |
| RGB | rgb(78, 120, 175) |
| HSL | hsl(214, 38%, 50%) |
| OKLCH | oklch(56.6% 0.098 255.6) |
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 #4E78AF | 4.53:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #4E78AF | 4.62:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #4E78AF text on white | 4.53:1 | AA | Lc 71.4 | Content text, not long reading |
| #4E78AF text on black | 4.62:1 | AA | Lc -30.3 | 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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AEC2DD
oklch(80.8% 0.044 255.9)
-
Step 400
400
#84A3CC
oklch(70.7% 0.07 255.6)
-
Step 500
500
#648CBF
oklch(63.1% 0.089 254.9)
-
Step 600
600 (this color)
#4E78AF
oklch(56.6% 0.098 255.6)
-
Step 700
700
#3C6293
oklch(49.1% 0.09 255.4)
-
Step 800
800
#325078
oklch(42.7% 0.076 256)
-
Step 900
900
#2C4360
oklch(37.8% 0.058 254.7)
-
Step 950
950
#1A2738
oklch(26.9% 0.037 255.4)
#4E78AF 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) | #627BB1 | 0.026 |
| Deuteranopia (no green cones) | #5572AE | 0.017 |
| Tritanopia (no blue cones) | #0F848C | 0.085 |
| Achromatopsia (no color) | #767676 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E78AF
#4E78AF
oklch(56.6% 0.098 255.6)
- #976D2B
#976D2B
oklch(56.5% 0.098 75.4)
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 #4E78AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.027
- Steel Blue #4682B4 ΔE 0.028
- Dull Blue #49759C ΔE 0.031
- Windows Blue #3778BF ΔE 0.031
- Cool Blue #4984B8 ΔE 0.033
- Stormy Blue #507B9C ΔE 0.034
- Cerulean #457B9D ΔE 0.034
- Off Blue #5684AE ΔE 0.037
Use #4E78AF 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.