#6C78AA
Closest named color: Off Blue (#5684AE). oklch(58.3% 0.078 273.4), rgb(108, 120, 170).
Aa
Black text reads best on this color (4.90:1).
About this color
#6C78AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.078 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.039 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #6C78AA |
| RGB | rgb(108, 120, 170) |
| HSL | hsl(228, 27%, 55%) |
| OKLCH | oklch(58.3% 0.078 273.4) |
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 #6C78AA | 4.28:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #6C78AA | 4.90:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #6C78AA text on white | 4.28:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #6C78AA text on black | 4.90:1 | AA | Lc -32.1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D8
oklch(81% 0.035 272.7)
-
Step 400
400
#959FC4
oklch(70.7% 0.055 273.1)
-
Step 500
500
#7B87B6
oklch(63.2% 0.072 273.1)
-
Step 600
600 (this color)
#6C78AA
oklch(58.3% 0.078 273.4)
-
Step 700
700
#535E8A
oklch(49.1% 0.072 272.8)
-
Step 800
800
#444D70
oklch(42.8% 0.059 272.6)
-
Step 900
900
#39405B
oklch(37.7% 0.047 272.8)
-
Step 950
950
#222635
oklch(27.2% 0.029 272.8)
#6C78AA 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) | #687DAC | 0.014 |
| Deuteranopia (no green cones) | #6378A9 | 0.012 |
| Tritanopia (no blue cones) | #5A828A | 0.070 |
| Achromatopsia (no color) | #7A7A7A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C78AA
#6C78AA
oklch(58.3% 0.078 273.4)
- #8B7A42
#8B7A42
oklch(58.3% 0.078 92.9)
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 #6C78AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.042
- Stormy Blue #507B9C ΔE 0.044
- Lavender Gray #7E7F9A ΔE 0.045
- Steel Blue #4682B4 ΔE 0.047
- Cool Blue #4984B8 ΔE 0.048
- Dull Blue #49759C ΔE 0.051
- Grey Blue #647D8E ΔE 0.052
Use #6C78AA 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.