#4E77B5
Closest named color: Windows Blue (#3778BF). oklch(56.7% 0.107 258.4), rgb(78, 119, 181).
Aa
Black text reads best on this color (4.62:1).
About this color
#4E77B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.107 and its hue 258°. 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 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #4E77B5 |
| RGB | rgb(78, 119, 181) |
| HSL | hsl(216, 41%, 51%) |
| OKLCH | oklch(56.7% 0.107 258.4) |
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 #4E77B5 | 4.53:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #4E77B5 | 4.62:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #4E77B5 text on white | 4.53:1 | AA | Lc 71.3 | Content text, not long reading |
| #4E77B5 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#83A2D1
oklch(70.7% 0.077 258.5)
-
Step 500
500
#648BC5
oklch(63.2% 0.098 258.1)
-
Step 600
600 (this color)
#4E77B5
oklch(56.7% 0.107 258.4)
-
Step 700
700
#3C6199
oklch(49.2% 0.1 258.4)
-
Step 800
800
#324F7C
oklch(42.7% 0.083 258.9)
-
Step 900
900
#2C4263
oklch(37.7% 0.063 258.3)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#4E77B5 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) | #5E7BB8 | 0.023 |
| Deuteranopia (no green cones) | #5172B4 | 0.014 |
| Tritanopia (no blue cones) | #00858D | 0.096 |
| Achromatopsia (no color) | #767676 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E77B5
#4E77B5
oklch(56.7% 0.107 258.4)
- #996E1D
#996E1D
oklch(56.8% 0.107 78.3)
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 #4E77B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.036
- French Blue #436BAD ΔE 0.038
- Dull Blue #49759C ΔE 0.040
- Nice Blue #107AB0 ΔE 0.043
- Muted Blue #3B719F ΔE 0.043
Use #4E77B5 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.