#1C73C2
Closest named color: Windows Blue (#3778BF). oklch(54.8% 0.146 251.1), rgb(28, 115, 194).
Aa
White text reads best on this color (4.90:1).
About this color
#1C73C2 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.146 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.024 away. White text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.28:1 |
| White text | 4.90:1 |
Values
| HEX | #1C73C2 |
| RGB | rgb(28, 115, 194) |
| HSL | hsl(209, 75%, 44%) |
| OKLCH | oklch(54.8% 0.146 251.1) |
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 #1C73C2 | 4.90:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #1C73C2 | 4.28:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #1C73C2 text on white | 4.90:1 | AA | Lc 73.5 | Content text, not long reading |
| #1C73C2 text on black | 4.28:1 | AA large text | Lc -28.2 | 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
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5E0
oklch(70.8% 0.105 251.1)
-
Step 500
500
#448DD7
oklch(63.1% 0.134 251)
-
Step 600
600 (this color)
#1C73C2
oklch(54.8% 0.146 251.1)
-
Step 700
700
#1062AA
oklch(49% 0.136 251.3)
-
Step 800
800
#12518A
oklch(42.8% 0.112 250.9)
-
Step 900
900
#18436E
oklch(37.6% 0.088 251.3)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#1C73C2 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) | #4C79C5 | 0.043 |
| Deuteranopia (no green cones) | #2F6AC0 | 0.025 |
| Tritanopia (no blue cones) | #008691 | 0.107 |
| Achromatopsia (no color) | #717171 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C73C2
#1C73C2
oklch(54.8% 0.146 251.1)
- #9B6300
#9B6300
oklch(54.8% 0.118 71.1)
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 #1C73C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.024
- Mid Blue #276AB3 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.038
- French Blue #436BAD ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.044
- Water Blue #0E87CC ΔE 0.055
- Muted Blue #3B719F ΔE 0.056
- Ocean Blue #03719C ΔE 0.062
Use #1C73C2 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.