#2777BE
Closest named color: Windows Blue (#3778BF). oklch(55.7% 0.134 249.6), rgb(39, 119, 190).
Aa
White text reads best on this color (4.69:1).
About this color
#2777BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.134 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.012 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.46:1 |
| White text | 4.69:1 |
Values
| HEX | #2777BE |
| RGB | rgb(39, 119, 190) |
| HSL | hsl(208, 66%, 45%) |
| OKLCH | oklch(55.7% 0.134 249.6) |
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 #2777BE | 4.69:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #2777BE | 4.46:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #2777BE text on white | 4.69:1 | AA | Lc 72.2 | Content text, not long reading |
| #2777BE text on black | 4.46:1 | AA large text | Lc -29.5 | Dividers and decoration only |
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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#71A5DA
oklch(70.6% 0.096 249.8)
-
Step 500
500
#488ED1
oklch(63.1% 0.124 249.5)
-
Step 600
600 (this color)
#2777BE
oklch(55.7% 0.134 249.6)
-
Step 700
700
#1863A4
oklch(49% 0.125 249.9)
-
Step 800
800
#185185
oklch(42.6% 0.104 250.2)
-
Step 900
900
#1B446A
oklch(37.7% 0.08 249.3)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#2777BE 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) | #557BC1 | 0.043 |
| Deuteranopia (no green cones) | #3E6DBD | 0.030 |
| Tritanopia (no blue cones) | #008891 | 0.098 |
| Achromatopsia (no color) | #747474 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2777BE
#2777BE
oklch(55.7% 0.134 249.6)
- #A06400
#A06400
oklch(55.6% 0.121 69.2)
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 #2777BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.012
- Nice Blue #107AB0 ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.038
- French Blue #436BAD ΔE 0.040
- Water Blue #0E87CC ΔE 0.045
- Steel Blue #4682B4 ΔE 0.047
- Muted Blue #3B719F ΔE 0.048
Use #2777BE 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.