#6178C8
Closest named color: Windows Blue (#3778BF). oklch(59.1% 0.125 270.1), rgb(97, 120, 200).
Aa
Black text reads best on this color (5.02:1).
About this color
#6178C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.125 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.047 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #6178C8 |
| RGB | rgb(97, 120, 200) |
| HSL | hsl(227, 48%, 58%) |
| OKLCH | oklch(59.1% 0.125 270.1) |
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 #6178C8 | 4.17:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #6178C8 | 5.02:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #6178C8 text on white | 4.17:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #6178C8 text on black | 5.02:1 | AA | Lc -33.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2C0E6
oklch(81% 0.056 269.2)
-
Step 400
400
#8B9EDA
oklch(70.7% 0.091 270.5)
-
Step 500
500
#6E85CF
oklch(63.1% 0.115 269.8)
-
Step 600
600 (this color)
#6178C8
oklch(59.1% 0.125 270.1)
-
Step 700
700
#475BA2
oklch(49% 0.116 269.9)
-
Step 800
800
#3B4B84
oklch(42.8% 0.097 270.1)
-
Step 900
900
#323F6A
oklch(37.8% 0.076 269.8)
-
Step 950
950
#1D253E
oklch(27% 0.048 269.5)
#6178C8 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) | #5881CB | 0.025 |
| Deuteranopia (no green cones) | #4D78C6 | 0.024 |
| Tritanopia (no blue cones) | #328996 | 0.112 |
| Achromatopsia (no color) | #7C7C7C | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6178C8
#6178C8
oklch(59.1% 0.125 270.1)
- #997900
#997900
oklch(59% 0.121 90.1)
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 #6178C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.054
- Off Blue #5684AE ΔE 0.060
- Soft Blue #6488EA ΔE 0.061
- Faded Blue #658CBB ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.065
- Water Blue #0E87CC ΔE 0.065
Use #6178C8 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.