#2775B7
Closest named color: Windows Blue (#3778BF). oklch(54.8% 0.127 248.4), rgb(39, 117, 183).
Aa
White text reads best on this color (4.86:1).
About this color
#2775B7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.127 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.020 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #2775B7 |
| RGB | rgb(39, 117, 183) |
| HSL | hsl(208, 65%, 44%) |
| OKLCH | oklch(54.8% 0.127 248.4) |
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 #2775B7 | 4.86:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #2775B7 | 4.31:1 | AA large text | Lc 30.7 | Non-text elements, placeholder text |
| #2775B7 text on white | 4.86:1 | AA | Lc 73.4 | Content text, not long reading |
| #2775B7 text on black | 4.31:1 | AA large text | Lc -28.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DBEE
oklch(88.4% 0.033 249.6)
-
Step 300
300
#A4C4E4
oklch(80.8% 0.057 248.5)
-
Step 400
400
#72A6D7
oklch(70.8% 0.091 247.8)
-
Step 500
500
#4B8ECD
oklch(63.1% 0.117 248.9)
-
Step 600
600 (this color)
#2775B7
oklch(54.8% 0.127 248.4)
-
Step 700
700
#1B64A0
oklch(49.1% 0.118 248.4)
-
Step 800
800
#1A5282
oklch(42.8% 0.098 248.5)
-
Step 900
900
#1C4468
oklch(37.7% 0.077 248.4)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#2775B7 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) | #5678BA | 0.045 |
| Deuteranopia (no green cones) | #416BB6 | 0.031 |
| Tritanopia (no blue cones) | #00858D | 0.093 |
| Achromatopsia (no color) | #717171 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2775B7
#2775B7
oklch(54.8% 0.127 248.4)
- #9E6100
#9E6100
oklch(54.8% 0.12 67.9)
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 #2775B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.020
- Nice Blue #107AB0 ΔE 0.022
- Flat Blue #3C73A8 ΔE 0.026
- Mid Blue #276AB3 ΔE 0.031
- French Blue #436BAD ΔE 0.033
- Muted Blue #3B719F ΔE 0.038
- Ocean Blue #03719C ΔE 0.047
- Steel Blue #4682B4 ΔE 0.049
Use #2775B7 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.