#1775C4
Closest named color: Windows Blue (#3778BF). oklch(55.3% 0.147 250.1), rgb(23, 117, 196).
Aa
White text reads best on this color (4.79:1).
About this color
#1775C4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.147 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.023 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #1775C4 |
| RGB | rgb(23, 117, 196) |
| HSL | hsl(207, 79%, 43%) |
| OKLCH | oklch(55.3% 0.147 250.1) |
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 #1775C4 | 4.79:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #1775C4 | 4.37:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #1775C4 text on white | 4.79:1 | AA | Lc 72.7 | Content text, not long reading |
| #1775C4 text on black | 4.37:1 | AA large text | Lc -28.9 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A1C5EA
oklch(81% 0.065 249.3)
-
Step 400
400
#6CA5E0
oklch(70.6% 0.106 250.3)
-
Step 500
500
#408DD8
oklch(63% 0.136 250.4)
-
Step 600
600 (this color)
#1775C4
oklch(55.3% 0.147 250.1)
-
Step 700
700
#0663AA
oklch(49.2% 0.136 249.9)
-
Step 800
800
#0D518A
oklch(42.7% 0.113 250)
-
Step 900
900
#16446E
oklch(37.8% 0.087 249.7)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#1775C4 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) | #4E7AC7 | 0.045 |
| Deuteranopia (no green cones) | #316BC2 | 0.028 |
| Tritanopia (no blue cones) | #008893 | 0.106 |
| Achromatopsia (no color) | #727272 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1775C4
#1775C4
oklch(55.3% 0.147 250.1)
- #9E6400
#9E6400
oklch(55.3% 0.12 70.3)
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 #1775C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.023
- Mid Blue #276AB3 ΔE 0.036
- Nice Blue #107AB0 ΔE 0.037
- French Blue #436BAD ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.046
- Water Blue #0E87CC ΔE 0.050
- Muted Blue #3B719F ΔE 0.059
- Steel Blue #4682B4 ΔE 0.060
Use #1775C4 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.