#3E77D7
Closest named color: Windows Blue (#3778BF). oklch(58% 0.159 260.2), rgb(62, 119, 215).
Aa
Black text reads best on this color (4.82:1).
About this color
#3E77D7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.159 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.039 away. Black text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #3E77D7 |
| RGB | rgb(62, 119, 215) |
| HSL | hsl(218, 66%, 54%) |
| OKLCH | oklch(58% 0.159 260.2) |
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 #3E77D7 | 4.35:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #3E77D7 | 4.82:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #3E77D7 text on white | 4.35:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #3E77D7 text on black | 4.82:1 | AA | Lc -31.9 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A6C2F0
oklch(80.9% 0.072 260.3)
-
Step 400
400
#76A1E8
oklch(70.7% 0.115 260.1)
-
Step 500
500
#5388E1
oklch(63.2% 0.146 260.2)
-
Step 600
600 (this color)
#3E77D7
oklch(58% 0.159 260.2)
-
Step 700
700
#295DB3
oklch(49.1% 0.148 260)
-
Step 800
800
#234C91
oklch(42.7% 0.123 260.2)
-
Step 900
900
#224074
oklch(37.7% 0.096 260.6)
-
Step 950
950
#142644
oklch(27% 0.061 260.1)
#3E77D7 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) | #4781DB | 0.029 |
| Deuteranopia (no green cones) | #2872D5 | 0.023 |
| Tritanopia (no blue cones) | #008D9C | 0.126 |
| Achromatopsia (no color) | #797979 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E77D7
#3E77D7
oklch(58% 0.159 260.2)
- #9F7100
#9F7100
oklch(58% 0.12 80.3)
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 #3E77D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.039
- Royal Blue #4169E1 ΔE 0.040
- Water Blue #0E87CC ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Clear Blue #247AFD ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.063
- Neon Blue #4361EE ΔE 0.067
- Cool Blue #4984B8 ΔE 0.067
Use #3E77D7 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.